Visiting Grandpa<br>Tyler visits his grandpa on Saturday. He meets grandpa at the nursing home. They drive to the park. Grandpa tells stories while they feed ducks. Tyler treats grandpa to ice cream before driving home.
Tyler's grandpa and grandma are at the nursing home.
We only know that Tyler visits his grandpa at the nursing home to take him on an outing, but we don't know anything about his grandma. The algorithm assumes only grandpa is there, because grandma is not mentioned.
( z0 be-located-at :ARG1 ( z1 and :op ( z2 person :ARG0-of ( z3 have-rel-role :ARG1 ( z4 person :name ( z5 name :op "Tyler" ) ) :ARG2 ( z6 grandpa ) ) ) :op ( z7 person :ARG0-of ( z8 have-rel-role :ARG1 z4 :ARG2 ( z9 grandma ) ) ) ) :ARG2 ( z10 home :mod ( z11 nurse ) ) )
(z0 / be-located-at-91
    :ARG1 (z1 / and
              :op1 (z2 / person
                       :ARG0-of (z3 / have-rel-role-91
                                    :ARG1 (z4 / person
                                              :name (z5 / name
                                                        :op1 "Tyler"))
                                    :ARG2 (z6 / grandpa)))
              :op2 (z7 / person
                       :ARG0-of (z8 / have-rel-role-91
                                    :ARG1 z4
                                    :ARG2 (z9 / grandma))))
    :ARG2 (z10 / home
               :mod (z11 / nurse-01)))
Tyler 's grandpa and grandma are at the nursing home .
z4 :name z5
z5 :op1 0
z2 :ARG0-of z3
z3 :ARG1 z4
z3 :ARG2 z6
z1 :op1 z2
z1 :op2 z7
z7 :ARG0-of z8
z8 :ARG1 z4
z8 :ARG2 z9
z0 :ARG1 z1
z10 :mod z11
z0 :ARG2 z10