Reward<br>Hillary had poor grades in her math class. Her mother told her she needed to improve her grades. She promised Hillary a trip if she got her grades up. Hillary worked hard and got her grade up to a B. Her mother planned a trip to a local amusement park.
Hillary's math grade was a C or lower prior to her mother's offer.
( z1 score-on-scale :ARG1 ( z2 grade :mod ( z3 mathematics ) :poss ( z4 person :name ( z5 name :op "Hillary" ) ) ) :ARG2 "C" :time ( z6 prior :op ( z7 offer :ARG0 ( z8 person :ARG0-of ( z9 have-rel-role :ARG1 z4 :ARG2 ( z10 mother ) ) ) ) ) )