Noun
a clause in a complex sentence that can stand alone as a complete sentence
Source: WordNetA different transformation raised embedded subjects into main clause subject position in sentences such as "John seems to have gone"; and yet a third reordered arguments in the dative alternation. Source: Internet
If the person in the main clause is different from that in the relative clause then this is indicated by with the person in the genitive and the verb is unmarked for person. Source: Internet