Java Reference
In-Depth Information
The
Annotation
class'
get
method, when used with an argument of
Core-
fChainAnnotation.class
, will return a
Map
instance of the
CorefChain
ob-
jects, as shown here. These objects contain information about the coreferences found in
the sentence:
Map<Integer, CorefChain> corefChainMap =
annotation.get(CorefChainAnnotation.class);
The set of the
CorefChain
objects is indexed using integers. We can iterate over these
objects as shown here. The key set is obtained and then each
CorefChain
object is dis-
played:
Set<Integer> set = corefChainMap.keySet();
Iterator<Integer> setIterator = set.iterator();
while(setIterator.hasNext()) {
CorefChain corefChain =
corefChainMap.get(setIterator.next());
System.out.println("CorefChain: " + corefChain);
}
The following output is generated:
CorefChain: CHAIN1-["He" in sentence 1, "his" in sentence 1]
CorefChain: CHAIN2-["his cash" in sentence 1]
CorefChain: CHAIN4-["she" in sentence 1, "her" in sentence
1]
CorefChain: CHAIN5-["her change" in sentence 1]
CorefChain: CHAIN7-["they" in sentence 1, "their" in
sentence 1]
CorefChain: CHAIN8-["their lunch" in sentence 1]
We get more detailed information using methods of the
CorefChain
and
CorefMen-
tion
classes. The latter class contains information about a specific coreference found in
the sentence.
Add the following code sequence to the body of the previous while loop to obtain and dis-
play this information. The
startIndex
and
endIndex
fields of the class refer to the
position of the words in the sentence:
