Complex sentence: Commercial production of natural gas from the Songo Songo island in the Indian Ocean off the Rufiji Delta commenced in 2004, with natural gas being pumped in a pipeline to Dar es Salaam, the bulk of it converted to electricity by both public utility and private operators.
Split into simpler sentences: Commercial production of natural gas from the Songo Songo island in the Indian Ocean off the Rufiji Delta commenced in 2004, with the gas being transported by pipeline to Dar es Salaam. The bulk of the gas is converted to electricity by both public utility and private operators.