Complex sentence: In 2013 Iran also announced for the first time since the Iranian revolution of 1979, the offering of production sharing contracts (PSCs) for the most complicated and difficult projects, such as deep-water wells in the Caspian Sea.
Split into simpler sentences: In 2013 Iran also announced for the first time since the Iranian revolution of 1979, the offering of production sharing contracts (PSCs). This will offered for the most complicated and difficult projects such as deep-water wells in the Caspian Sea.