Question: Mauricio "Baboo" Da Silva, is a Brazilian kyokushin kaikan full contact karate practitioner and former professional kickboxer and mixed martial artist, he's aprofessional coach and trainer of K-1 and MMA (Mixed Martial Arts), who has trained a number of world class fighters including which American-Samoan kickboxer, boxer and mixed martial artist of Samoan heritage who competes in the Heavyweight division, often billed as who? 
Sentence (from "Eric Esch"): Beginning in 2003, he began fighting regularly as a kickboxer and mixed martial artist, most notably in K-1 and the Pride Fighting Championships.
Relevant evidence: No