Complex sentence: Her sixth foray, commencing on 27 May, was also successful, the Argentinian "Rio Tercero" went to the bottom on 22 June, followed by the American "City of Birmingham" on 1 July.
Split into simpler sentences: Her sixth foray, commencing on 27 May, was also successful. The Argentinian "Rio Tercero" went to the bottom on 22 June, followed by the American "City of Birmingham" on 1 July.