Does the sentence "Uranium's average concentration in the Earth's crust is (depending on the reference) 2 to 4 parts per million, or about 40 times as abundant as silver." provide a valid answer to the question "How many kilograms of uranium may be contained in the oceans?"

A: no

Does the sentence "They include the week-long Harborfest festivities and a Boston Pops concert accompanied by fireworks on the banks of the Charles River." provide a valid answer to the question "Where is the annual Boston Arts festival?"

A: no

Does the sentence "The largest bank in Uruguay is Banco Republica (BROU), based in Montevideo." provide a valid answer to the question "What is the largest bank in Uruguay?"

A: yes

Does the sentence "When central authority collapsed after 189 AD, wealthy landowners, members of the aristocracy/nobility, and regional military-governors relied upon their retainers to act as their own personal troops (buqu )." provide a valid answer to the question "How could conscription into military service be avoided?"

A:
no