Complex sentence: Planxty dissolved and from 1976 to 1978 he played as a duo with Irvine, a relationship which produced "Andy Irvine and Paul Brady", an album that was hugely successful and garnered much critical acclaim.
Split into simpler sentences: Planxty dissolved and from 1976 to 1978 he played as a duo with Andy Irvine, a relationship which produced "Andy Irvine and Paul Brady". The album was hugely successful and garnered much critical acclaim.