11515
They were then mentored for several years by Alton Ellis whom they met producing songs for their Natty Dread and Natty Dread Version albums and then again doing backing vocals for  him  at  DEB  Music .
 employee of: him, DEB
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: cities of residence, top members employees, members, alternate names, origin, state or provinces of residence, title of person, spouse, city of headquarters, NA, founded by, state or province of headquarters, employee of, countries of residence, country of birth, founded, subsidiaries, country of headquarters 
Text: {0} 
 Entity Pairs:  him, DEB 
Answer:
 employee of: him, DEB