Complex sentence: Coal India Limited (CIL) is an Indian state-controlled coal mining company headquartered in Kolkata, West Bengal, India and the world's largest coal miner with revenue exceeding 624.15 billion (FY 2012).
Split into simpler sentences: Coal India Limited (CIL) is an Indian state-controlled coal mining company headquartered in Kolkata, West Bengal, India. It is the world's largest coal miner with revenue exceeding 624.15 billion (FY 2012).