Robert<br>Robert was a homeless man in Reno. He did yard work around the neighborhood for beer money. One day a family he worked for invited him to live in their garage. The family was very nice to Robert. Robert did all the yard work in payment.
Robert is not a nice man.
We do not know whether or not Robert is a nice man, the family was nice to Robert, but we do not know if he reciprocated.  Therefore the statement is neither definitely correct nor definitely incorrect.
( z1 man :ARG1-of ( z2 nice :polarity - ) :domain ( z3 person :name ( z4 name :op "Robert" ) ) )