Complex sentence: Shaw studied and taught Hapkido and Taekwondo until in 1987 he was the first American to be awarded the 7th Degree Black Belt in Moo Duk Kwan Taekwondo in 1988 he earned the rank of 7th Degree Black Belt in Kumdo.
Split into simpler sentences: Shaw studied and taught Hapkido and Taekwondo until in 1987 he was the first American to be awarded the 7th Degree Black Belt in Moo Duk Kwan Taekwondo. In 1988 he earned the rank of 7th Degree Black Belt in Kumdo.