What is polysemy?
Is it always by accident that two polysemous words sound, or are written alike? Give an example to illustrate your answer.
'Sofa' and 'couch' clearly are synonyms. Give an example where they are not interchangable.
Draw a four-tiered inheritance hierarchy for the noun 'elm'. Assign a feature at each node which applies to (almost) every member of the category it expresses.
Name one possible application of wordnet to NLP.