It is not clear if this is a principled distinction, or if you are meant to look only at the type, ...
e.g. _the_stutter1 (for "the the") but _the_2rbst for ("a the").
The names of the relevant lexical entries in lexicon-rbst.tdl have now been made consistent with the convention that each robust entry's name now ends either in _rbst or in _mal.
It is not clear if this is a principled distinction, or if you are meant to look only at the type, ... e.g. _the_stutter1 (for "the the") but _the_2rbst for ("a the").