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. 
( z0 come :ARG1 ( z1 she ) :ARG4 ( z2 school ) :manner ( z3 concern :ARG0 ( z4 go :ARG0 z1 :ARG4 ( z5 prom ) :manner ( z6 alone ) ) :ARG1 z1 ) :time ( z7 date-entity :weekday ( z8 wednesday ) ) )
(z0 / come-01
    :ARG1 (z1 / she)
    :ARG4 (z2 / school)
    :manner (z3 / concern-01
                :ARG0 (z4 / go-02
                          :ARG0 z1
                          :ARG4 (z5 / prom)
                          :manner (z6 / alone))
                :ARG1 z1)
    :time (z7 / date-entity
              :weekday (z8 / wednesday)))
She came to school Wednesday concerned about going to prom alone .
z0 :ARG1 z1
z0 :ARG4 z2
z0 :time z7
z7 :weekday z8
z0 :manner z3
z3 :ARG1 z1
z3 :ARG0 z4
z4 :ARG0 z1
z4 :ARG4 z5
z4 :manner z6