Complex sentence: The first stage would be a freight line, linking Ruwais to the Shah gas field, in cooperation with Abu Dhabi National Oil Company; in September 2010, Union Railway sought bids from rolling stock suppliers.
Split into simpler sentences: The first stage would be a freight line, linking Ruwais to the Shah gas field, in cooperation with Abu Dhabi National Oil Company. In September 2010 Union Railway sought bids from rolling stock suppliers.