Complex sentence: In 1971 his band toured with Uriah Heep that asked him to join them and so he was hired in order to substitute Mark Clarke on february 1972 and stayed until february 1975.
Split into simpler sentences: In 1971 his band toured with Uriah Heep. THey asked him to join them and so he was hired in order to substitute Mark Clarke on february 1972 and stayed until february 1975.