Complex sentence: When Heera comes to know about this theft and that he is in possession of stolen property, he decides to turn Panna in to the police but discovers that Panna is Reema's younger sister.
Split into simpler sentences: When Heera comes to know about this theft and that he is in possession of stolen property, he decides to turn Panna in to the police. Heera also discovers that Panna is Reema's younger sister.