Does the sentence "Although an explanation for the phenomenon was not provided until 1919, duralumin was one of the first "age hardening" alloys to be used, and was soon followed by many others." provide a valid answer to the question "What was used in the construction of modern aircraft?" OPTIONS:
- yes
- no

A: yes

Does the sentence "Their interactions result in an interlocked feedback loop of gene products resulting in periodic fluctuations that the cells of the body interpret as a specific time of the day.[citation needed]" provide a valid answer to the question "What is the Drosophila gene the cause of?" OPTIONS:
- yes
- no

A: no

Does the sentence "He gained and has maintained renown worldwide as one of the leading musicians of his era, whose "poetic genius was based on a professional technique that was without equal in his generation." provide a valid answer to the question "For what instrument did Frederic write primarily for?" OPTIONS:
- yes
- no

A: no

Does the sentence "A distinct Greek political identity re-emerged in the 11th century in educated circles and became more forceful after the fall of Constantinople to the Crusaders of the Fourth Crusade in 1204, so that when the empire was revived in 1261, it became in many ways a Greek national state." provide a valid answer to the question "What caused the resurface of the Grecian monotony in politics ?" OPTIONS:
- yes
- no

A:
yes