premise: With over 40 years of training and experience in Taekwondo and Hapkido, Master Chang also trained extensively in ITF/WTF TKD, Moo Duk Kwan, and Judo.
hypothesis: With over 40 years of training in Taekwondo and Hapkido, Master Chang also trained extensively in ITF / WTF TKD, Moo Duk Kwan, and Judo.