The following (1st and 2nd person) forms are
ambiguous in German between personal pronouns (PPER) and reflexive
pronouns (PRF): mich, dich, dir, mir, euch, uns. This makes
disambiguation dependent on whether a verb is reflexive or not.
Criteria for PRF are (STTS; for human taggers)
- verb must be lexicalized as reflexive verb
- Subject and pronoun in question must agree (German: person
and number)
- case of pronoun in question must not clash with demanded case
of lexicalized reflexive verb (dative or accusative).
The tagger lexicon lexicon does not provide syntactic
information (such as subcategorization or reflexivity).
Moreover, the relevant features (gender, case) are not
destinguished in the tagset. Thus, automatic taggers cannot
access the criteria which are necessary to disambiguate
personal/reflexive pronouns. We still can test if the
instances of non-ambiguous pronouns (ihn/ihr/ihm vs. sich)
can provide enough statistic data to handle the ambiguous
cases.
