Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
In 1966, Yale began discussions with its sister school Vassar College about merging to foster coeducation at the undergraduate level. Vassar, then all-female and part of the Seven Sisterselite higher education schools that historically served as sister institutions to the Ivy League when the Ivy League still only admitted mententatively accepted, but then declined the invitation. Both schools introduced coeducation independently in 1969. Amy Solomon was the first woman to register as a Yale undergraduate; she was also the first woman at Yale to join an undergraduate society, St. Anthony Hall. The undergraduate class of 1973 was the first class to have women starting from freshman year; at the time, all undergraduate women were housed in Vanderbilt Hall at the south end of Old Campus.[citation needed]
What year did the first undergraduate class including women graduate from Yale?
A: 1973

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
In all organisms, two steps are required to read the information encoded in a gene's DNA and produce the protein it specifies. First, the gene's DNA is transcribed to messenger RNA (mRNA).:6.1 Second, that mRNA is translated to protein.:6.2 RNA-coding genes must still go through the first step, but are not translated into protein. The process of producing a biologically functional molecule of either RNA or protein is called gene expression, and the resulting molecule is called a gene product.
How many steps are required to read the information encoded in a gene's DNA and produce the specified protein?
A: two steps are required

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
The Eisenhowers had two sons. Doud Dwight "Icky" Eisenhower was born September 24, 1917, and died of scarlet fever on January 2, 1921, at the age of three; Eisenhower was mostly reticent to discuss his death. Their second son, John Eisenhower (19222013), was born in Denver Colorado. John served in the United States Army, retired as a brigadier general, became an author and served as U.S. Ambassador to Belgium from 1969 to 1971. Coincidentally, John graduated from West Point on D-Day, June 6, 1944. He married Barbara Jean Thompson on June 10, 1947. John and Barbara had four children: David, Barbara Ann, Susan Elaine and Mary Jean. David, after whom Camp David is named, married Richard Nixon's daughter Julie in 1968. John died on December 21, 2013.
What was John Eisenhower's final rank in the military?
A: brigadier general

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Mechanical pulping yields almost a tonne of pulp per tonne of dry wood used, which is why mechanical pulps are sometimes referred to as "high yield" pulps. With almost twice the yield as chemical pulping, mechanical pulps is often cheaper. Mass-market paperback books and newspapers tend to use mechanical papers. Book publishers tend to use acid-free paper, made from fully bleached chemical pulps for hardback and trade paperback books.
Because it has a lower yield, what type of pulping is often cheaper?
A:
unanswerable