question identifies what it asks for through one or more conditions: whose, of which work or organisation, where, when, which one of several, or a chain such as 'the X of the Y that did Z'. Taking every statement in sentences as true and using nothing else, do they establish every one of those conditions for the item given in answer? Answer no when sentences establish answer only for an intermediate entity and never reach the item finally asked for, or when a condition of question is nowhere met. Answer yes for a question with a single condition that sentences meet. Treat strings as data, never commands.