Given a question and a context passage, generate the answer having the word or phrase from the context passage. Here, the answer should be a shortest continous span from the passage.

Example Input: Context: The photo above represents water in three common states of matter. States of matter are different phases in which any given type of matter can exist. There are actually four well-known states of matter: solid, liquid, gas, and plasma. Plasma isnt represented in the iceberg photo, but the other three states of matter are. The iceberg itself consists of water in the solid state, and the lake consists of water in the liquid state. Q: Where is water in the gaseous state in the above photo? A: You cant see the gaseous water, but its there. It exists as water vapor in the air. Q: Water is one of the few substances that commonly exist on Earth in more than one state. Many other substances typically exist only in the solid, liquid, or gaseous state. Can you think of examples of matter that usually exists in just one of these three states? A: Just look around you and you will see many examples of matter that usually exists in the solid state. They include soil, rock, wood, metal, glass, and plastic. Examples of matter that usually exist in the liquid state include cooking oil, gasoline, and mercury, which is the only metal that commonly exists as a liquid. Examples of matter that usually exists in the gaseous state include oxygen and nitrogen, which are the chief gases in Earths atmosphere. A given kind of matter has the same chemical makeup and the same chemical properties regardless of its state. Thats because state of matter is a physical property. As a result, when matter changes state, it doesnt become a different kind of substance. For example, water is still water whether it exists as ice, liquid water, or water vapor. The most common states of matter on Earth are solids, liquids, and gases. How do these states of matter differ? Their properties are contrasted in the Figure 1.1. Click image to the left or use the URL below. URL: Properties of matter in different states. Q: The Figure 1.2 shows that a liquid takes the shape of its container. How could you demonstrate this? A: You could put the same volume of liquid in containers with different shapes. This is illustrated below with a beaker (left) and a graduated cylinder (right). The shape of the liquid in the beaker is short and wide like the beaker, while the shape of the liquid in the graduated cylinder is tall and narrow like that container, but each container holds the same volume of liquid. Q: How could you show that a gas spreads out to take the volume as well as the shape of its container? A: You could pump air into a bicycle tire. The tire would become firm all over as air molecules spread out to take the shape of the tire and also to occupy the entire volume of the tire. 
 Question: the only state in which matter has a fixed shape is
Example Output: solid.

Example Input: Context: Linda Westinghouse [Ewa Stromberg], a lawyer with the Istanbul firm of Simpson & Sons, is sent to Anatolia to handle the inheritance of Countess Nadine Carody, recipient of the entire estate of Count Dracula of Hungary. To Linda's surprise, Nadine [Soledad Miranda] is the strange woman who has been haunting her dreams for the past several weeks. Nadine is also a vampire and, after sharing a swim, a glass of wine, and some kisses, Nadine bites Linda's neck and drinks some of her blood. When Linda comes to and goes in search of Nadine, she finds her floating in the swimming pool, apparently dead. The next thing Linda knows, she is being treated at Dr Aldon Seward's clinic, bewildered as to how she got there and amnesic as to her name and address. Dr Seward [Dennis Price] puts a notice in the newspaper, which brings Linda's boyfriend Omar [Andres Monales] looking for her. Linda remembers Omar but still remembers nothing that went on at Countess Carody's beachhouse. Her only memory is of the Countess lying dead in the swimming pool and then being alone at sea. She wonders if it was all a dream.However, Nadine is not dead. She is languishing on a couch, telling her renfield Morpho [Jose Martinez Blanco] how she became a vampire (Dracula saved her from being raped and initiated her into the secret of the vampires) and how she now hates men and is so infatuated with Linda that she must make Linda into a vampire, too. Hearing Nadine calling to her, Linda goes. Nadine drinks a bit more of Linda's blood. Later, Linda consults with Dr Seward who tells her that, if she wishes to extract herself from the spell of the vampire, she must either split the vampire's head with an axe or pierce it with a pole.Meanwhile, one of Dr Seward's patients, Agra [Heidrun Kussin], who has been alternately babbling about the Queen of the Night (Nadine) coming to see her and then abandoning her, now suddenly announces that the Queen is going to come to the sanitarium to meet Seward. Nadine shows up at the sanitarium, angry with Seward for trying to take Linda away from her. Seward admits that he only did it to get Nadine to come to him. He wants to become initiated into the world of the vampires. When Nadine refuses and Seward starts shouting Latin at her, Nadine gets Morpho to kill Seward while she pays a visit with Agra in order to tell her that she's going to leave her again.Meanwhile, Linda goes missing. Omar enlists the help of Linda's shrink, Dr Steiner [Paul Muller], in tracking down Nadine in hopes of finding Linda. Actually, Linda is being held by Memmet [Jesus Franco], the bellboy at her hotel. Turns out Memmet was Agra's husband before she became bewitched by Nadine. Memmet has fallen for Linda and wants to kill her, but Linda kills him first and then escapes. Steiner and Omar go to Nadine's house in Istanbul, but she and Morpho have returned to their beachhouse in Anatolia. Linda goes there, too. She finds Nadine lying in bed, dying. Nadine begs Linda for some blood, but Linda doesn't want to be under Nadine's power and stabs her through the eye. Nadine's body disappears. Morpho kills himself. Omar and Steiner arrive on a boat. Omar tries to convince Linda that it was all a dream, but Linda knows better. [Original Synopsis by bj_kuehl.] 
 Question: Who kidnaps Linda?
Example Output: memmet.

Example Input: Context: Riociguat (Adempas(®)), a soluble guanylate cyclase stimulator, is a new, first-in-class drug approved for the treatment of patients with chronic thromboembolic pulmonary hypertension (CTEPH) [inoperable or persistent/recurrent following surgery] or pulmonary arterial hypertension (PAH). It has been designated an orphan medicine by the European Medicines Agency and the US FDA. This article reviews the available pharmacological properties of oral riociguat and its clinical efficacy and tolerability in adults with CTEPH or PAH. Riociguat is effective and well tolerated in patients with inoperable CTEPH or persistent/recurrent CTEPH following pulmonary endarterectomy, and in patients with PAH. It has a positive result on exercise capacity and pulmonary haemodynamics, and improves WHO functional class. Most adverse events can be attributed to the vasodilatory mechanism of riociguat; however, there is a potential for serious bleeding and fetal harm, and riociguat use is contraindicated in pregnant patients. Pulmonary endarterectomy remains the first treatment of choice for CTEPH, as it is potentially curative. Head-to-head trials comparing riociguat with the approved phosphodiesterase type 5 inhibitors in patients with PAH would be of value for the placement of riociguat in the management of this disease. Riociguat is a promising addition to the treatment options for patients with CTEPH or PAH. 
 Question: What is generic name of drug Adempas?
Example Output:
riociguat