Complex sentence: Kambiz trained under Shinzen karate teacher Reza Taheri and rose to prominence in Shinzen Karate circles after defeating two Shinzen Karate champions in "knockdown" competitions.
Split into simpler sentences: Kambiz trained under Shinzen karate teacher Reza Taheri. Kambiz rose to prominence in Shinzen Karate circles after defeating two Shinzen Karate champions in "knockdown" competitions.