Complex sentence: The band was formed by brothers Martyn and Steve Young, Ian Robbins, and vocalist Debbion Currie and Robbins departed the band in 1983, with the role of vocalist being filled by Lorita Grahame from that point on.
Split into simpler sentences: The band was formed by brothers Martyn and Steve Young, Ian Robbins, and vocalist Debian Curry. Curry and Robbins departed the band in 1983, with the role of vocalist being filled by Lorita Grahame from that point on.