TASK DEFINITION: A question that is free of any grammatical or logcal errors, should be labeled 'yes', otherwise it should be indicated as 'no'. A question is grammatically correct if all its entities i.e. nouns, verbs, adjectives, prepositions, pronouns, adverbs are at appropriate position. A question is logically correct if the semantic makes sense.
PROBLEM: Sentence: Diggler became a prominent model and began appearing in pornographic films , after Which his career took off .
Question: Was Diggler still a model in her 40s?

SOLUTION: No.

PROBLEM: Sentence: There were a couple times that the family dog, Mika, has tried to take Joey from Marsha and eat him!.
Question: How often does Mika try to eat Joey?

SOLUTION: No.

PROBLEM: Sentence: The Serbian, who beat Tsonga in the 2008 Australian Open final, ended the dream run of Australian 18-year-old Bernard Tomic.
Question: What happened before the Serbian beat Tsonga?

SOLUTION:
Yes.