Complex sentence: Six of the horses he had beaten convincingly at Epsom reopposed Tartan Bearer in the Irish Derby the following month so it was no surprise that he started the even money favourite, with no New Approach in the line up.
Split into simpler sentences: Six of the horses he had beaten at Epsom reopposed Tartan Bearer in the Irish Derby the following month. He started the even money favourite, with no New Approach in the line up.