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|context> => |context: Mary went sledding>

supported-ops |Mary> => |op: went> + |op: won> + |op: cheered> + |op: cheered-because>
went |Mary> => |sledding>
won |Mary> => |a race>
cheered |Mary> => |because>
cheered-because |Mary> => |it was her first time winning>

supported-ops |sledding> => |op: with>
with |sledding> => |her family>

supported-ops |a race> => |op: against> + |op: to> + |op: a-race-to>
against |a race> => |her brother>
to |a race> => |the bottom>
a-race-to |a race> => |the bottom>

supported-ops |it> => |op: was>
was |it> => |her first time winning>

supported-ops |because> => |op: because>
because |because> => |it was her first time winning>

supported-ops |it was her first time winning> => |op: it-was>
it-was |it was her first time winning> => |her first time winning>
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