It is a relative pronoun; its antecedent is seven years . I’m not sure I understand your question, though. Can you give an example of how you want to change the sentence?
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
Son JamesThe "which" in this sentence is similar to the "which" in the first sentence, isn't it?No, except that they’re both relative pronouns. The former is different in two ways: it does not follow a preposition, and it refers to the entire main clause rather than a phrase.