Door<br>Alvin opened the door. He surprised his Wife. His wife had a visitor. His name was Frank. His wife was cheating on him with Frank.
Frank knew Alvin was coming then.
Reason:  They were surprised; since it was an affair, Frank would not have been there had he known Alvin was coming.  Why:  It couldn't decided between Incorrect or Neither (this one was right on the line!)
( z0 know :ARG0 ( z1 person :name ( z2 name :op "Frank" ) ) :ARG1 ( z3 come :ARG1 ( z4 person :name ( z5 name :op "Alvin" ) ) :time ( z6 then ) ) )
(z0 / know-01
    :ARG0 (z1 / person
              :name (z2 / name
                        :op1 "Frank"))
    :ARG1 (z3 / come-01
              :ARG1 (z4 / person
                        :name (z5 / name
                                  :op1 "Alvin"))
              :time (z6 / then)))
Frank knew Alvin was coming then .
z1 :name z2
z2 :op1 1
z0 :ARG0 z1
z4 :name z5
z5 :op1 0
z3 :ARG1 z4
z0 :ARG1 z3
z3 :time z6