Complex sentence: On 26 March 2008 O'Connor made his senior international debut for Northern Ireland in a 4--1 win against Georgia in friendly at Windsor Park; he came on as half-time substitute for Damien Johnson.
Split into simpler sentences: On 26 March 2008 O'Connor made his senior international debut for Northern Ireland in a 4--1 win against Georgia. During the friendly at Windsor Park, he came on as half-time substitute for Damien Johnson.