Complex sentence: Their first big chance came in the 10th minute when Rose slung a low cross to Dempsey in on the edge of the six-yard box, but Dempsey's resulting shot was off-frame.
Split into simpler sentences: Their first big chance came in the 10th minute when Rose slung a low cross to Dempsey. Positioned just on the edge of the six-yard box, Dempsey's shot was off-frame.