String documentText = cas.getDocumentText();
selectorNode.addProperty(new UriRef("http://www.w3.org/1999/02/22-rdf-syntax-ns#type"),
AO.Selector);
selectorNode.addProperty(new UriRef("http://www.w3.org/1999/02/22-rdf-syntax-ns#type"),
AOSELECTORS.OffsetRangeTextSelector);
selectorNode.addProperty(new UriRef("http://www.w3.org/1999/02/22-rdf-syntax-ns#type"),
AOSELECTORS.PrefixPostfixTextSelector);
selectorNode.addPropertyValue(AOSELECTORS.exact, getSpan(documentText, sel.start, sel.end));
selectorNode.addPropertyValue(AOSELECTORS.prefix,
getSpan(documentText, sel.start - 50, sel.start));
selectorNode.addPropertyValue(AOSELECTORS.postfix,