Complex sentence: The vote was brought by Opposition leader Margaret Thatcher and was lost by the Labour Government by one vote (311 votes to 310), which was announced at 10:19 pm, forcing a general election which was won by Thatcher's party.
Split into simpler sentences: The vote was brought by Opposition leader Margaret Thatcher and was lost by the Labour Government by one vote (311 votes to 310), which was announced at 10:19 pm. The result forced a general election which was won by Thatcher's party.