Complex sentence: In the 1980s, the technique of foldforming metal was developed by Charles Lewton-Brain, who from a young age was interested in art and was inspired to pursue his interest in jewelry by his girlfriend's mother.
Split into simpler sentences: In the 1980s the technique of foldforming metal was developed by Charles Lewton-Brain. Ever since he was young he was interested in art and was inspired to pursue his interest in jewelry by his girlfriend's mother.