Complex sentence: Bárbara is about to commit (during the celebration of her birthday), to Peter (Carlos Gascón), who claims to be Spaniard and just send one more bankruptcy and failed multiple business undertakes.
Split into simpler sentences: Bárbara is about to commit (during the celebration of her birthday), to Peter (Carlos Gascón), who claims to be Spaniard. He just sent one more bankruptcy and failed multiple business undertakes.