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land and water also have to support event psychology.
( z0 obligate :ARG1 ( z1 and :op ( z2 land ) :op ( z3 water ) ) :ARG2 ( z4 support :ARG0 z1 :ARG1 ( z5 psychology :mod ( z6 event ) ) ) :mod ( z7 also ) )
(z0 / obligate-01
    :ARG1 (z1 / and
              :op1 (z2 / land)
              :op2 (z3 / water))
    :ARG2 (z4 / support-01
              :ARG0 z1
              :ARG1 (z5 / psychology
                        :mod (z6 / event)))
    :mod (z7 / also))
land and water also have to support event psychology .
z1 :op1 z2
z1 :op2 z3
z0 :mod z7
z0 :ARG1 z1
z0 :ARG2 z4
z4 :ARG0 z1
z5 :mod z6
z4 :ARG1 z5