Does the sentence "Fryderyk may have had some piano instruction from his mother, but his first professional music tutor, from 1816 to 1821, was the Czech pianist Wojciech Zywny." provide a valid answer to the question "Who was Chopin's earliest piece of music, that there is a record of, dedicated to?"

A: yes

Does the sentence "Bell had worried that the flight was too dangerous and had arranged for a doctor to be on hand." provide a valid answer to the question "On what month and day did the Silver Dart take its first flight?"

A: no

Does the sentence "The US intervened with airstrikes in Iraq over ISIL held territories and assets in August, and in September a coalition of US and Middle Eastern powers initiated a bombing campaign in Syria aimed at degrading and destroying ISIL and Al-Nusra-held territory." provide a valid answer to the question "What legal ethos does ISIL operate under?"

A: no

Does the sentence "Improving technology and increasing control of world markets allowed British traders to develop a commercial chain in which raw cotton fibers were (at first) purchased from colonial plantations, processed into cotton cloth in the mills of Lancashire, and then exported on British ships to captive colonial markets in West Africa, India, and China (via Shanghai and Hong Kong)." provide a valid answer to the question "From what source was raw cotton first bought and later resold?"

A:
yes