Does the sentence "Nigeria was ranked 30th in the world in terms of GDP (PPP) in 2012." provide a valid answer to the question "Where did Nigeria's 2012 GDP rank?"

A: yes

Does the sentence "After killing Stilwell, Wyatt deputized others and rode on a vendetta, killing three more cowboys over the next few days before leaving the state." provide a valid answer to the question "Who killed Brazelton?"

A: no

Does the sentence "Wood density is determined by multiple growth and physiological factors compounded into "one fairly easily measured wood characteristic"" provide a valid answer to the question "What author called wood's density "fairly easily measured"?"

A: no

Does the sentence "In its turn, under anaerobic conditions, the ferrous hydroxide (Fe(OH)_2 ) can be oxidized by the protons of water to form magnetite and molecular hydrogen." provide a valid answer to the question "Under what condition can ferrous hydroxide be oxidized?"

A:
yes