Complex sentence: When Porterfield resigned as coach in August 2007 due to suffering from advanced cancer, Minasyan was appointed manager of Armenia, and Englishman Tom Jones became his assistant coach and lasted six matches as a manager of Armenia, before being terminated.
Split into simpler sentences: When Porterfield resigned as coach in August 2007 due to suffering from advanced cancer, Minasyan was appointed manager of Armenia, and Englishman Tom Jones became his assistant coach. Minasyan lasted six matches as manager of Armenia, before being terminated.