studiyng is hardly boring,if you have a teacher like ours;))
these are his examples for grammar section "relative clauses":

my brother who is gay likes the dog,which lives in the kitchen,where i was conceived,which annoyed the cook of the restaurant where they dined,which they often did.

the car that i crashed was driven by pensioner,who wore glasses,which looked like mine,which i bought in Turkey,where i met bob,who is a mutant.

the sausage that i ate had been made by the chef who was born in america,where i shot my first mexican,who was crossing the desert.

)))it is not a full list,but i think,it's enough for now))))