Does the sentence "Thales' student Pythagoras of Samos founded the Pythagorean school, which investigated mathematics for its own sake, and was the first to postulate that the Earth is spherical in shape." provide a valid answer to the question "Who was the first person to determine that the Earth is round?"

A: yes

Does the sentence "Gustav Mahler's 1906 Symphony No. 8, for example, has been performed with over 150 instrumentalists and choirs of over 400." provide a valid answer to the question "What size orchestras have performed Gustav Mahler's 1906 Symphony No. 8?"

A: yes

Does the sentence "The building itself is the original abbey church." provide a valid answer to the question "What style architecture is the Westminster Abbey considered?"

A: no

Does the sentence "Black Panther Party co-founder Bobby Seale and ten other Party members were tried for murdering an alleged informant." provide a valid answer to the question "What was the name of one of the party's leader that also happen to be on trial?"

A:
yes