The dance<br>Katie wanted to go to the dance. She did not have a date. She knew she would be asked at some point. One day at school, her crush finally asked her. Katie could not have been more excited.
Katie and her crush go to school together
The context states that Katie was asked to go to the dance during school, so she and her crush must go to the same school. The system could likely not interpret the word 'together' in terms of meaning going to the same school, and assumed it meant they literally go to school as a pair. 
( z1 go :ARG0 ( z2 and :op ( z3 person :name ( z4 name :op "Katie" ) ) :op ( z5 person :ARG0-of ( z6 crush :ARG1 z3 ) ) ) :ARG4 ( z7 school ) :mod ( z8 together ) )