Complex sentence: As a teen, he moved to Texas and attended Ross S Sterling High School after he graduated he formed the rap group, R.M.G., and upon relocating to Los Angeles, the crew signed a deal with Virgin Records.
Split into simpler sentences: As a teen, he moved to Texas and attended Ross S Sterling High School. After graduation, he formed the rap group, R.M.G., and upon relocating to Los Angeles, the crew signed a deal with Virgin Records.