Q: Does "By comparison, escort carriers were developed to provide defense for convoys of ships." provide a valid answer to "What were most escort carriers built from?"?
OPTIONS:
- yes
- no
A: no

Q: Does "There have been experiments to extract uranium from sea water, but the yield has been low due to the carbonate present in the water." provide a valid answer to "About how many tonnes of uranium is theorized to be present in the sea?"?
OPTIONS:
- yes
- no
A: no

Q: Does "Von Neumann's abstract treatment permitted him also to confront the foundational issue of determinism versus non-determinism, and in the book he presented a proof that the statistical results of quantum mechanics could not possibly be averages of an underlying set of determined "hidden variables," as in classical statistical mechanics." provide a valid answer to "Von Neumann's abstract treatment allowed him to work on what foundational issue?"?
OPTIONS:
- yes
- no
A: yes

Q: Does "Shoen holders had access to manpower and, as they obtained improved military technology (such as new training methods, more powerful bows, armor, horses, and superior swords) and faced worsening local conditions in the ninth century, military service became part of shoen life." provide a valid answer to "Which class became a new military elite?"?
OPTIONS:
- yes
- no
A:
no