Does the sentence "She erected it in fulfillment of a vow that she made having escaped from a deadly storm in 425 on the sea voyage from Constantinople to Ravenna." provide a valid answer to the question "Why did Galla Placidia erect the church of San Giovanni Evangelista?"

A: yes

Does the sentence "Eisenhower returned to the U.S. in December 1939 and was assigned as a battalion commander and regimental executive officer of the 15th Infantry at Fort Lewis, Washington." provide a valid answer to the question "At what military installation was the 15th Infantry based?"

A: yes

Does the sentence "In 1977 Hanna Holborn Gray was appointed acting President of Yale from this position, and went on to become President of the University of Chicago, the first woman to be full president of a major university." provide a valid answer to the question "Who was appointed acting President of Yale in 1977?"

A: yes

Does the sentence "In Armenia Russian has no official status, but it's recognised as a minority language under the Framework Convention for the Protection of National Minorities." provide a valid answer to the question "What percent of Armenia uses Russian as their main language?"

A:
no