Complex sentence: Armstrong joined Hearts from their Boys Club system in 2004 and tasted his first involvement of senior action when named as an unused substitute for the Tynecastle club's match against Dunfermline Athletic on 2 January 2007.
Split into simpler sentences: Armstrong joined Hearts from their Boys Club system in 2004. He tasted his first involvement of senior action when named as an unused substitute for the Tynecastle club's match against Dunfermline Athletic on 2 January 2007.