From what I thought a long time ago, the main point of a sentence is contained in the top level clause. That makes me question whether one can use a statement following a relative pronoun to end a sentence, and to make that clause the most meaningful information in the sentence. For instance, if I say, The city descended and stood on a new planet, which was becoming home to the people who escaped from earth. The main statement in the sentence is "The city descended and stood on a new planet", but there is meaningful information that is subordinate to it, which ends the sentence as though it were the main information. The new information is always to supposed to come at the end, so the main clause is leading into the relative one. Is this acceptable?