Problem: Immunology:

Maternal factors also play a role in the body's immune response. At birth, most of the immunoglobulin present is maternal IgG. Because IgM, IgD, IgE and IgA don't cross the placenta, they are almost undetectable at birth. Some IgA is provided by breast milk. These passively-acquired antibodies can protect the newborn for up to 18 months, but their response is usually short-lived and of low affinity. These antibodies can also produce a negative response. If a child is exposed to the antibody for a particular antigen before being exposed to the antigen itself then the child will produce a dampened response. Passively acquired maternal antibodies can suppress the antibody response to active immunization. Similarly the response of T-cells to vaccination differs in children compared to adults, and vaccines that induce Th1 responses in adults do not readily elicit these same responses in neonates. Between six to nine months after birth, a child's immune system begins to respond more strongly to glycoproteins, but there is usually no marked improvement in their response to polysaccharides until they are at least one year old. This can be the reason for distinct time frames found in vaccination schedules.

Newborns can acquire antibodies from the mother through what means?
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A: breast milk

Problem: The investigation of the transmitted signals started immediately after the launch of Compass -M1 on 14 April 2007. Soon after in June 2007, engineers at CNES reported the spectrum and structure of the signals. A month later, researchers from Stanford University reported the complete decoding of the "I" signals components. The knowledge of the codes allowed a group of engineers at Septentrio to build the COMPASS receiver and report tracking and multipath characteristics of the "I" signals on E2 and E5B.
In what month of 2008 was Compass-M1 launched?
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Answer: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
The term dialect (from Latin dialectus, dialectos, from the ancient Greek word dialektos, "discourse", from dia, "through" and lego, "I speak") is used in two distinct ways to refer to two different types of linguistic phenomena.
Which term is used in three distinct ways?
A: unanswerable

Context and question: The two became friends, and for many years lived in close proximity in Paris, Chopin at 38 Rue de la Chaussee-d'Antin, and Liszt at the Hotel de France on the Rue Lafitte, a few blocks away. They performed together on seven occasions between 1833 and 1841. The first, on 2 April 1833, was at a benefit concert organized by Hector Berlioz for his bankrupt Shakespearean actress wife Harriet Smithson, during which they played George Onslow's Sonata in F minor for piano duet. Later joint appearances included a benefit concert for the Benevolent Association of Polish Ladies in Paris. Their last appearance together in public was for a charity concert conducted for the Beethoven Memorial in Bonn, held at the Salle Pleyel and the Paris Conservatory on 25 and 26 April 1841.
How many times did Chopin and Liszy perform together in public?
Answer: seven

Question: The Canadian football field is 150 yards (137 m) long and 65 yards (59 m) wide with end zones 20 yards (18 m) deep, and goal lines 110 yards (101 m) apart. At each goal line is a set of 40-foot-high (12 m) goalposts, which consist of two uprights joined by an 18 12-foot-long (5.6 m) crossbar which is 10 feet (3 m) above the goal line. The goalposts may be H-shaped (both posts fixed in the ground) although in the higher-calibre competitions the tuning-fork design (supported by a single curved post behind the goal line, so that each post starts 10 feet (3 m) above the ground) is preferred. The sides of the field are marked by white sidelines, the goal line is marked in white, and white lines are drawn laterally across the field every 5 yards (4.6 m) from the goal line. These lateral lines are called "yard lines" and often marked with the distance in yards from and an arrow pointed toward the nearest goal line. In previous decades, arrows were not used and every yard line was usually marked with the distance to the goal line, including the goal line itself which was marked with a "0"; in most stadiums today, the 10-, 20-, 30-, 40-, and 50-yard lines are marked with numbers, with the goal line sometimes being marked with a "G". The centre (55-yard) line usually is marked with a "C". "Hash marks" are painted in white, parallel to the yardage lines, at 1 yard (0.9 m) intervals, 24 yards (21.9 m) from the sidelines. On fields that have a surrounding running track, such as Commonwealth Stadium, Molson Stadium, and many universities, the end zones are often cut off in the corners to accommodate the track. In 2014, Edmonton placed turf over the track to create full end zones. This was particularly common among U.S.-based teams during the CFL's American expansion, where few American stadiums were able to accommodate the much longer and noticeably wider CFL field.
Is there an answer to this question: What are marked with yellow sidelines?

Answer: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
In the American Old West, policing was often of very poor quality.[citation needed] The Army often provided some policing alongside poorly resourced sheriffs and temporarily organized posses.[citation needed] Public organizations were supplemented by private contractors, notably the Pinkerton National Detective Agency, which was hired by individuals, businessmen, local governments and the federal government. At its height, the Pinkerton Agency's numbers exceeded those of the United States Army.[citation needed]
What were the Old West's national police options?
A:
unanswerable