} else if (q instanceof EOOrQualifier) {
Collection<Sentence> components = convertCollection(((EOOrQualifier) q).qualifiers());
return new BinaryJoined(BinaryOperator.OR, components);
} else if (q instanceof EONotQualifier) {
Sentence component = convert(((EONotQualifier) q).qualifier());
return new Negation(component);
} else if (q instanceof EOKeyValueQualifier) {
return convertComparison((EOKeyValueQualifier) q);
} else {