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They always serve vegetarian food.
( z0 serve :ARG0 ( z1 they ) :ARG1 ( z2 food :mod ( z3 vegetarian ) ) :time ( z4 always ) )
(z0 / serve-02
    :ARG0 (z1 / they)
    :ARG1 (z2 / food
              :mod (z3 / vegetarian))
    :time (z4 / always))
They always serve vegetarian food .
z0 :time z4
z0 :ARG0 z1
z2 :mod z3
z0 :ARG1 z2