Can one say: a. That is a lion, which is a dangerous animal. The speaker means to say that that is a lion and the lion is a dangerous animal. So there is a general statement following a particular one. I think the sentence is fine as it is, but then again, we can have: b. That is a lion, which is in a cage. Here the clause defines a certain lion. In the first case, the clause (claws?!!) tells us something about all lions. Many thanks.