Angela<br>Angela loved diving. Angela decided she wanted to teach diving for a living. Angela took diving instructor classes. Angela received all her instructor certifications. Angela found a job teaching diving in Cozumel.
Angela received all her instructor certifications without tuition. 
The context states that Angela too diving instructor classes, so she definitely received tuition on her way to becoming qualified. The system could likely not understand the word tuition.
( z1 receive :ARG0 ( z2 person :name ( z3 name :op "Angela" ) ) :ARG1 ( z4 certification :mod ( z5 person :ARG0-of ( z6 instruct ) ) :mod ( z7 all ) :poss z2 ) :manner ( z8 tuition :polarity - ) )