Dance<br>Janet was concerned about her upcoming prom. Her prom was on Friday. She came to school Wednesday concerned about not having a date. Fortunately Ben also did not have a date. So Ben asked Janet to prom and both of their problems were solved.
She came to school Wednesday concerned about going to prom alone.
If she is going to prom alone then she doesn't have a date. I don't think the system knows it is the same thing. 
( z1 come :ARG1 ( z2 she ) :ARG4 ( z3 school ) :time ( z4 date-entity :weekday ( z5 wednesday ) ) :ARG0-of ( z6 concern :ARG1 z2 :topic ( z7 go :ARG0 z2 :ARG4 ( z8 prom ) :mod ( z9 alone ) ) ) )