Problem: Does "No compounds of zinc in oxidation states other than +1 or +2 are known." answer the question "what are the only two oxidation states known for zinc?"

A: yes

Problem: Does "At the start of 1971, Pope Paul VI set the number of cardinal electors at a maximum of 120, but set no limit on the number of cardinals generally." answer the question "What did the composition of the cardinals consist of?"

A: no

Problem: Does "In 1968 Noam Chomsky and Morris Halle published The Sound Pattern of English (SPE), the basis for generative phonology." answer the question "When was The Sound Pattern of English published?"

A:
yes