I am actually confused in the usage of "which". In some sentences, which usually refer to the preceding noun, but I have seen that, usually when there is a modifying clause between the main noun ( the noun being modified) and which, which refers to that main noun even if the modifying clause has a noun to which "which" can refer to. For Example:-
1) Scientists have recently received permission to research embryonic stem cells, derived from blastocysts or early stage embryos, which they believe.....
What does which refer to, cells( main noun) or embryos ( the previous noun which is a valid candidate for which.
Also, in the sentence below:-
2) Out of the public's interest in the details of and conflict in othe people's lives have grown a market for "reality" television shows, which are bringing.....
"which refers to the market or the shows?? Do we have to go by the meaning of the sentence and see what should be the antecedent of "which" or do we have to go by the logic of "which" that it refers to the previous eligible candidate??
Could you please elaborate?
Thanks and Regards