Q: Does "Unless these instruments are played by members doubling on another instrument (for example, a trombone player changing to euphonium for a certain passage), orchestras will use freelance musicians to augment their regular rosters." provide a valid answer to "What is the name of the modified member of the horn family appearing in several works by Strauss?"?
A: no

Q: Does "Three of the techniques in ISO 12232:2006 are carried over from the 1998 version of the standard, while two new techniques allowing for measurement of JPEG output files are introduced from CIPA DC-004." provide a valid answer to "How many techniques are available because of ISO 12232:2006?"?
A: no

Q: Does "They escorted and protected nine black students' entry to Little Rock Central High School, an all-white public school, for the first time since the Reconstruction Era." provide a valid answer to "How many black students were escorted by the 101st Airborne to Little Rock Central High School?"?
A: yes

Q: Does "It is possible that genetic and/or environmental disturbances to the normal sleep and wake cycle can increase the susceptibility to addiction." provide a valid answer to "What can the disrupted circadian system cause?"?
A:
no