Qui ou Lequel

Question

There is aIIl veut visiter le château qui est au milieu de la forêt.Can we use lequel ?Still confused with lequel.

Answer

Qui is the subject of a subordinate clause.Lequel is the indirect object of a subordinate clause and is used in conjunction with a preposition.Anne m'a montré le livre, qui te plaît tant. -- Anne showed me the book, that you like so much.Anne m'a montré le livre dans lequel le héros s'appelle comme toi. -- Anne showed me the book, in which the hero has the same name as you.A remark on the side: care must be taken with the preposition de, which sometimes needs the relative pronoun dont and sometimes duquel/de laquelle, but that's a different story...