derek-thomas/squad-v1.1-t5-question-generation huggingface dataset:
155th Street starts on the West Side at Riverside Drive, crossing Broadway, Amsterdam Avenue and St. Nicholas Avenue. At St. Nicholas Place, the terrain drops off steeply, and 155th Street is carried on a 1,600-foot (490 m) long viaduct, a City Landmark constructed in 1893, that slopes down towards the Harlem River, continuing onto the Macombs Dam Bridge, crossing over (but not intersecting with) the Harlem River Drive. A separate, unconnected section of 155th Street runs under the viaduct, connecting Bradhurst Avenue and the Harlem River Drive.

Question: Where does 155th Street start? Question: 155th Street crosses Broadway, Amsterdam Avenue, and what other Avenue? Question: How many meters long is the viaduct on which 155th Street travels? Question: In what year was the viaduct along 155th Street constructed? Question: A section of 155th Street connects Harlem River Drive and what Avenue?
181st Street is a major thoroughfare running through the Washington Heights neighborhood. It runs from the Washington Bridge in the east, to the Henry Hudson Parkway in the west, near the George Washington Bridge and the Hudson River. The west end is called Plaza Lafayette.

Question: Which road runs from the Washington Bridge to the Henry Hudson Parkway? Question: 181st Street runs through what neighborhood? Question: Which river does 181st Street run near? Question: Does Plaza Lafayette refer to the east or west end of 181st Street? Question: What is the west end of 181st Street called?
West of Fort Washington Avenue, 181st Street is largely residential, bordering Hudson Heights and having a few shops to serve the local residents. East of Fort Washington Avenue, the street becomes increasingly commercial, becoming dominated entirely by retail stores where the street reaches Broadway and continues as such until reaching the Harlem River. It is the area's major shopping district.

Question: In which direction is 181st Street largely residential? Question: In which direction is 181st Street mostly commercial? Question: Which street marks the western boundary of the shopping distrit? Question: Which river touches the major shopping district near 181st Street?
181st Street is served by two New York City Subway lines; there is a 181st Street station at Fort Washington Avenue on the IND Eighth Avenue Line (A trains) and a 181st Street station at St. Nicholas Avenue on the IRT Broadway – Seventh Avenue Line (1 trains). The stations are about 500 metres (550 yd) from each other and are not connected. The George Washington Bridge Bus Terminal is a couple of blocks south on Fort Washington Avenue. 181st Street is also the last south/west exit in New York on the Trans-Manhattan Expressway (I-95), just before crossing the George Washington Bridge to New Jersey.

Question: How many subway lines serve 181st Street? Question: How many metres apart are 181st Street's two subway stations? Question: On what avenue is the George Wasington Bridge Bus Terminal? Question: Which road is the Trans-Manhattan Expressway's last south/west exit?
187th Street crosses Washington Heights and running from Laurel Hill Terrace in the east to Chittenden Avenue in the west near the George Washington Bridge and Hudson River. The street is interrupted by a long set of stairs east of Fort Washington Avenue leading to the Broadway valley. West of there, it is mostly lined with store fronts and serves as a main shopping district for the Hudson Heights neighborhood.

Question: 187th Street runs from Laurel Hill Terrace in the east to which avenue in the west? Question: What is 187th Street interrupted by? Question: Where do the stairs interrupting 187th street lead to? Question: An area of 187th Street serves as the main shopping district for which neighborhood?
187th Street intersects with, from East to West, Laurel Hill Terrace, Amsterdam Avenue, Audubon Avenue, St. Nicholas Avenue, Wadsworth Avenue, Broadway, Bennett Avenue, Overlook Terrace, Fort Washington Avenue, Pinehurst Avenue, Cabrini Boulevard and Chittenden Avenue.

Question: Wadsworth Avenue is intersected by what street? Question: Which is the eastmost intersection that 187th Street has? Question: Which is the westernmost intersection that 187th Street has?
The many institutions on 187th Street include Mount Sinai Jewish Center, the Dombrov Shtiebel, and the uptown campus of Yeshiva University. The local public elementary school P.S. 187 is located on Cabrini Boulevard, just north of the eponymous 187th Street

Question: On what street is the Dombrov Shtiebel? Question: On what street is the Mount Sinai Jewish Center? Question: Which University has a campus on 187th Street? Question: Which school is located on Cabrini Boulevard? Question: Cabrini Boulevard is just north of what street?
The brain is an organ that serves as the center of the nervous system in all vertebrate and most invertebrate animals. Only a few invertebrates such as sponges, jellyfish, adult sea squirts and starfish do not have a brain; diffuse or localised nerve nets are present instead. The brain is located in the head, usually close to the primary sensory organs for such senses as vision, hearing, balance, taste, and smell. The brain is the most complex organ in a vertebrate's body. In a typical human, the cerebral cortex (the largest part) is estimated to contain 15–33 billion neurons, each connected by synapses to several thousand other neurons. These neurons communicate with one another by means of long protoplasmic fibers called axons, which carry trains of signal pulses called action potentials to distant parts of the brain or body targeting specific recipient cells.

Question: What is the center of the nervous system in all creatures? Question: A few animals without spines that do not have a brain are what? Question: What is the most complex organ in an animal's body? Question: In people, how many neurons make up the cerebral cortex? Question: Neurons in the brain interact with each other by fibers called what?
Physiologically, the function of the brain is to exert centralized control over the other organs of the body. The brain acts on the rest of the body both by generating patterns of muscle activity and by driving the secretion of chemicals called hormones. This centralized control allows rapid and coordinated responses to changes in the environment. Some basic types of responsiveness such as reflexes can be mediated by the spinal cord or peripheral ganglia, but sophisticated purposeful control of behavior based on complex sensory input requires the information integrating capabilities of a centralized brain.

Question: Hormones secreted are driven by what organ in the body? Question: What type of responsiveness can be used without a brain? Question: Reflexes only require one of what two structures in a body?
The operations of individual brain cells are now understood in considerable detail but the way they cooperate in ensembles of millions is yet to be solved. Recent models in modern neuroscience treat the brain as a biological computer, very different in mechanism from an electronic computer, but similar in the sense that it acquires information from the surrounding world, stores it, and processes it in a variety of ways, analogous to the central processing unit (CPU) in a computer.

Question: Which part of a computer does the brain most resemble?
This article compares the properties of brains across the entire range of animal species, with the greatest attention to vertebrates. It deals with the human brain insofar as it shares the properties of other brains. The ways in which the human brain differs from other brains are covered in the human brain article. Several topics that might be covered here are instead covered there because much more can be said about them in a human context. The most important is brain disease and the effects of brain damage, covered in the human brain article because the most common diseases of the human brain either do not show up in other species, or else manifest themselves in different ways.

Question: Animals with a spine are called what?
The shape and size of the brain varies greatly in different species, and identifying common features is often difficult. Nevertheless, there are a number of principles of brain architecture that apply across a wide range of species. Some aspects of brain structure are common to almost the entire range of animal species; others distinguish "advanced" brains from more primitive ones, or distinguish vertebrates from invertebrates.

Question: Animals without a spine are called what?
The simplest way to gain information about brain anatomy is by visual inspection, but many more sophisticated techniques have been developed. Brain tissue in its natural state is too soft to work with, but it can be hardened by immersion in alcohol or other fixatives, and then sliced apart for examination of the interior. Visually, the interior of the brain consists of areas of so-called grey matter, with a dark color, separated by areas of white matter, with a lighter color. Further information can be gained by staining slices of brain tissue with a variety of chemicals that bring out areas where specific types of molecules are present in high concentrations. It is also possible to examine the microstructure of brain tissue using a microscope, and to trace the pattern of connections from one brain area to another.

Question: The easiest way to learn about brain anatomy is by what? Question: Brain tissue is naturally soft, but can be stiffened with what liquid? Question: The two main areas of the brain are what colors? Question: Grey matter of the brain is what color? Question: What instrument can you use to examine the microstructure of the brain?
The brains of all species are composed primarily of two broad classes of cells: neurons and glial cells. Glial cells (also known as glia or neuroglia) come in several types, and perform a number of critical functions, including structural support, metabolic support, insulation, and guidance of development. Neurons, however, are usually considered the most important cells in the brain. The property that makes neurons unique is their ability to send signals to specific target cells over long distances. They send these signals by means of an axon, which is a thin protoplasmic fiber that extends from the cell body and projects, usually with numerous branches, to other areas, sometimes nearby, sometimes in distant parts of the brain or body. The length of an axon can be extraordinary: for example, if a pyramidal cell, (an excitatory neuron) of the cerebral cortex were magnified so that its cell body became the size of a human body, its axon, equally magnified, would become a cable a few centimeters in diameter, extending more than a kilometer. These axons transmit signals in the form of electrochemical pulses called action potentials, which last less than a thousandth of a second and travel along the axon at speeds of 1–100 meters per second. Some neurons emit action potentials constantly, at rates of 10–100 per second, usually in irregular patterns; other neurons are quiet most of the time, but occasionally emit a burst of action potentials.

Question: Brains of organisms are made up mostly of what two classes of cells? Question: Which of the two broad classes of cells: neurons and glial cells send signals to other cells? Question: Glial cells are also referred to as what? Question: Axons send signals that are named what? Question: What is the typical speed that axons send their electrical signals?
Axons transmit signals to other neurons by means of specialized junctions called synapses. A single axon may make as many as several thousand synaptic connections with other cells. When an action potential, traveling along an axon, arrives at a synapse, it causes a chemical called a neurotransmitter to be released. The neurotransmitter binds to receptor molecules in the membrane of the target cell.

Question: Axons send signals to other neurons by junctions known as what? Question: An axon can connect to how many other cells? Question: The neurotansmitter binds to what of a target cell?
Synapses are the key functional elements of the brain. The essential function of the brain is cell-to-cell communication, and synapses are the points at which communication occurs. The human brain has been estimated to contain approximately 100 trillion synapses; even the brain of a fruit fly contains several million. The functions of these synapses are very diverse: some are excitatory (exciting the target cell); others are inhibitory; others work by activating second messenger systems that change the internal chemistry of their target cells in complex ways. A large number of synapses are dynamically modifiable; that is, they are capable of changing strength in a way that is controlled by the patterns of signals that pass through them. It is widely believed that activity-dependent modification of synapses is the brain's primary mechanism for learning and memory.

Question: The primary job of the brain is what? Question: How many synapses does the human brain supposedly contain? Question: The fruit fly has a brain that has how many synapses? Question: A synapse whose purpose is to excite the target cell are called what?
Most of the space in the brain is taken up by axons, which are often bundled together in what are called nerve fiber tracts. A myelinated axon is wrapped in a fatty insulating sheath of myelin, which serves to greatly increase the speed of signal propagation. (There are also unmyelinated axons). Myelin is white, making parts of the brain filled exclusively with nerve fibers appear as light-colored white matter, in contrast to the darker-colored grey matter that marks areas with high densities of neuron cell bodies.

Question: Most of the space in the brain is made up of what structures? Question: Axons grouped together are known as what? Question: An axon that can greatly increase speed of signals is wrapped in what? Question: Myelin is what color in the brain? Question: Grey matter of the brain consist of lots of what?
Except for a few primitive organisms such as sponges (which have no nervous system) and cnidarians (which have a nervous system consisting of a diffuse nerve net), all living multicellular animals are bilaterians, meaning animals with a bilaterally symmetric body shape (that is, left and right sides that are approximate mirror images of each other). All bilaterians are thought to have descended from a common ancestor that appeared early in the Cambrian period, 485-540 million years ago, and it has been hypothesized that this common ancestor had the shape of a simple tubeworm with a segmented body. At a schematic level, that basic worm-shape continues to be reflected in the body and nervous system architecture of all modern bilaterians, including vertebrates. The fundamental bilateral body form is a tube with a hollow gut cavity running from the mouth to the anus, and a nerve cord with an enlargement (a ganglion) for each body segment, with an especially large ganglion at the front, called the brain. The brain is small and simple in some species, such as nematode worms; in other species, including vertebrates, it is the most complex organ in the body. Some types of worms, such as leeches, also have an enlarged ganglion at the back end of the nerve cord, known as a "tail brain".

Question: Creatures that have a diffuse nerve net are called what? Question: Bilaterians are animals that have what? Question: The Cambrian period was how long ago? Question: A nerve cord with an enlargement is called what? Question: What type of creature has a ganglion at the back end of the nerve cord as well?
There are a few types of existing bilaterians that lack a recognizable brain, including echinoderms, tunicates, and acoelomorphs (a group of primitive flatworms). It has not been definitively established whether the existence of these brainless species indicates that the earliest bilaterians lacked a brain, or whether their ancestors evolved in a way that led to the disappearance of a previously existing brain structure.

Question: Some bilaterians without a brain are what? Question: A name for a group of primitive flatworms is what?
Two groups of invertebrates have notably complex brains: arthropods (insects, crustaceans, arachnids, and others), and cephalopods (octopuses, squids, and similar molluscs). The brains of arthropods and cephalopods arise from twin parallel nerve cords that extend through the body of the animal. Arthropods have a central brain with three divisions and large optical lobes behind each eye for visual processing. Cephalopods such as the octopus and squid have the largest brains of any invertebrates.

Question: Which two groups of invertebrates have complex brains? Question: Arthropods and cephalopods have brains that come from a pair of what? Question: The invertebrates with the largest brain are what two animals?
There are several invertebrate species whose brains have been studied intensively because they have properties that make them convenient for experimental work:

Question: Which brains are easier to work on, vertebrates or invertebrates?
The first vertebrates appeared over 500 million years ago (Mya), during the Cambrian period, and may have resembled the modern hagfish in form. Sharks appeared about 450 Mya, amphibians about 400 Mya, reptiles about 350 Mya, and mammals about 200 Mya. Each species has an equally long evolutionary history, but the brains of modern hagfishes, lampreys, sharks, amphibians, reptiles, and mammals show a gradient of size and complexity that roughly follows the evolutionary sequence. All of these brains contain the same set of basic anatomical components, but many are rudimentary in the hagfish, whereas in mammals the foremost part (the telencephalon) is greatly elaborated and expanded.

Question: How long ago did the first vertebrate organisms appear? Question: During which scientific period did vertebrates appear? Question: Sharks appeared at about how many Mya? Question: At how many mya did mammals first appear in time? Question: The foremost part of the brain in mammals is known as what?
Brains are most simply compared in terms of their size. The relationship between brain size, body size and other variables has been studied across a wide range of vertebrate species. As a rule, brain size increases with body size, but not in a simple linear proportion. In general, smaller animals tend to have larger brains, measured as a fraction of body size. For mammals, the relationship between brain volume and body mass essentially follows a power law with an exponent of about 0.75. This formula describes the central tendency, but every family of mammals departs from it to some degree, in a way that reflects in part the complexity of their behavior. For example, primates have brains 5 to 10 times larger than the formula predicts. Predators tend to have larger brains than their prey, relative to body size.

Question: In mammals, brain volume and body mass follows a power law with an exponent of what? Question: Which group of animals have brains 5-10 times larger than the formula predicts? Question: Do predators have larger or smaller brains compared to their prey?
All vertebrate brains share a common underlying form, which appears most clearly during early stages of embryonic development. In its earliest form, the brain appears as three swellings at the front end of the neural tube; these swellings eventually become the forebrain, midbrain, and hindbrain (the prosencephalon, mesencephalon, and rhombencephalon, respectively). At the earliest stages of brain development, the three areas are roughly equal in size. In many classes of vertebrates, such as fish and amphibians, the three parts remain similar in size in the adult, but in mammals the forebrain becomes much larger than the other parts, and the midbrain becomes very small.

Question: During development, the brain is made up of three swellings at the front of what? Question: The forebrain during development is known as what? Question: The midbrain during development is known as what? Question: The hindbrain during development is known as what? Question: Which group of animals does the forebrain grow the largest?
The brains of vertebrates are made of very soft tissue. Living brain tissue is pinkish on the outside and mostly white on the inside, with subtle variations in color. Vertebrate brains are surrounded by a system of connective tissue membranes called meninges that separate the skull from the brain. Blood vessels enter the central nervous system through holes in the meningeal layers. The cells in the blood vessel walls are joined tightly to one another, forming the blood–brain barrier, which blocks the passage of many toxins and pathogens (though at the same time blocking antibodies and some drugs, thereby presenting special challenges in treatment of diseases of the brain).

Question: Brain tissue that is living is what color on the outside? Question: The color of the brain inside is what? Question: Brains are surrounded by what system of tissues? Question: Meninges separate what structure from the brain? Question: The blood-brain barrier is made up of what?
Neuroanatomists usually divide the vertebrate brain into six main regions: the telencephalon (cerebral hemispheres), diencephalon (thalamus and hypothalamus), mesencephalon (midbrain), cerebellum, pons, and medulla oblongata. Each of these areas has a complex internal structure. Some parts, such as the cerebral cortex and the cerebellar cortex, consist of layers that are folded or convoluted to fit within the available space. Other parts, such as the thalamus and hypothalamus, consist of clusters of many small nuclei. Thousands of distinguishable areas can be identified within the vertebrate brain based on fine distinctions of neural structure, chemistry, and connectivity.

Question: People who study the anatomy of the central nervous system are known as what? Question: The cerebral hemispheres of the brain are called what? Question: The thalamus and hypothalamus comprise what region of the brain? Question: The midbrain region of the brain is known as what? Question: Clusters of small nuclei comprise what parts of the brain?
Although the same basic components are present in all vertebrate brains, some branches of vertebrate evolution have led to substantial distortions of brain geometry, especially in the forebrain area. The brain of a shark shows the basic components in a straightforward way, but in teleost fishes (the great majority of existing fish species), the forebrain has become "everted", like a sock turned inside out. In birds, there are also major changes in forebrain structure. These distortions can make it difficult to match brain components from one species with those of another species.

Question: Which part of the brain has led to many distortions among different species? Question: The forebrain is everted in what type of fishes?
The most obvious difference between the brains of mammals and other vertebrates is in terms of size. On average, a mammal has a brain roughly twice as large as that of a bird of the same body size, and ten times as large as that of a reptile of the same body size.

Question: The biggest difference between brains of mammals and other vertebrates is what? Question: A mammal's brain is how many times larger than a birds relative to body size? Question: A mammal's brain is how many times larger than a reptiles relative to body size?