Does "During this period, Fryderyk was sometimes invited to the Belweder Palace as playmate to the son of the ruler of Russian Poland, Grand Duke Constantine; he played the piano for the Duke and composed a march for him." contain the correct answer to "What is the title and name of the ruler whose son Chopin was friends with?"

A: yes

Does "Similar organizations in other countries followed: The American Anthropological Association in 1902, the Anthropological Society of Madrid (1865), the Anthropological Society of Vienna (1870), the Italian Society of Anthropology and Ethnology (1871), and many others subsequently." contain the correct answer to "When was the American Anthropological Association founded?"

A: yes

Does "Marsyas could not do this, as he only knew how to use the flute and could not sing at the same time." contain the correct answer to "What instrument did Marsyas know how to play?"

A:
yes