Complex sentence: Richard recognises the music and tries to communicate with Blondel, who is seized by the guards, but he is freed when he tells Florestan of an assignation Laurette wants with him the following night.
Split into simpler sentences: Richard recognises the music and tries to communicate with Blondel, who is seized by the guards. But he is freed when he tells Florestan of an assignation Laurette wants with him the following night.