For example, the sentence 'take the cup off the table and bring it to
the shelf' has six different parses, four labeled with 'smain', and two
labeled with 'smain/.r'. Previously, since the labels were used for the
dictionary keys, only two parses were returned (and the others
overwritten).
Now, the parses are labeled as smain, smain/0, smain/.r, smain/.r/0,
etc. to provide unique keys.