Q: Does "The father played the flute and violin; the mother played the piano and gave lessons to boys in the boarding house that the Chopins kept." provide a valid answer to "What instrument did Chopin's mother teach?"?
A: yes

Q: Does "The 21st century has so far been characterized by a continuation of the contemporary/postmodern musical era." provide a valid answer to "What era has the 21st century has been characterized by?"?
A: yes

Q: Does "At dawn on Sunday, 25 June 1950, the Korean People's Army crossed the 38th parallel behind artillery fire." provide a valid answer to "Who provoked a conflict by crossing the 38th parallel?"?
A: yes

Q: Does "Another coating consideration is rapid diffusion of coating metal into Tin solder." provide a valid answer to "What might the rapid diffusion of coating metal into tin solder leave in the surface coating?"?
A:
no