Complex sentence: He left Scepter Records in 1972 and spent a short period, in 1973 and 1974, with Paramount Records, during which time he released two albums, "Songs" (1973) and "Longhorns & London Bridges" (1974).
Split into simpler sentences: He left Scepter Records in 1972, and spent a short period, in 1973 and 1974, with Paramount Records. During his time with Paramount Records, Thomas released two albums, "Songs" (1973) and "Longhorns & London Bridges" (1974).