Unni Cathrine Eiken February 2005

The training and test material was modified by excluding all EPAS with non-verbal predicates,
as well as all EPAS with the predicate være (be). This was done to see if these structures disturb
the data material by adding irrelevant information that does not contribute to giving more
information about the distribution of arguments in the EPAS. The accuracy increased slightly
upon this modification of the data set. The editing did, however, not increase the accuracy when
training on the edited EPAS_arg1 list and testing on EPAS containing pronouns in argument 1
position.
4.1.2.2 Classifying argument 2
Analogous to the classification steps performed for argument 1, the classifications were repeated
for occurrences of argument 2. The EPAS list with the second argument as category label will in
the following be referred to as EPAS_arg2.
Test 1
Training set: EPAS_arg2 with no pronouns, argument 2 ignored.
Test set: EPAS with pronouns in argument 2 position
Result: (0/6) correct classifications
Training the classifier on the EPAS_arg2 list without pronouns and testing on the EPAS with
pronouns in argument 2 position did not produce any correct classifications. This is likely to in
part be because of the small size of the test data set, as well as the homogenous nature of the test
instances. Five of the wrongly classified instances were in fact of the same type; in all instances,
the classifier had assigned the category kvinne (woman), while the correct antecedent was
Slåtten.
Test 2
Training set: EPAS_arg2 with no pronouns, argument 2 ignored
Test set: leave-one-out
Result: 49,73% (95/191) correct classifications
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