Complex sentence: Jackie gains entry through help of a prostitute, Venus, and finds that the Brotherhood has been tracking him, his gang, and his family for many years, before he is captured by their leader, Victor Valente.
Split into simpler sentences: Jackie gains entry through help of a prostitute named Venus and finds that the Brotherhood has been tracking him, his gang, and his family for many years. Shortly after discovering this, he is captured by their leader, Victor Valente.