Complex sentence: After approaching nearly all the major recording companies and recording producers in London and being rejected, Epstein managed to secure an EMI recording contract, when an EMI record producer, George Martin, offered a contract on behalf of EMI's small Parlophone label.
Split into simpler sentences: After approaching nearly all the major recording companies and recording producers in London and being rejected, Epstein managed to secure an EMI recording contract. An EMI record producer, George Martin, offered a contract on behalf of EMI's small Parlophone label.