Divide these nouns into proper (8) and common (24). Find in the list of common nouns 9 abstract? 7 contract? 4 material and 4 collective nouns.
Celt, agriculture, anorak, cloud, ice, carelessness, buffalo, Berlin, team, audience, Robin Hood, bravery, California, cream, Chicago, citizen, cockatoo, comfort, company, eucalyptus, ecology, John, energy, horror, influence, knowledge, legend, Mary, Macdonald`s, caviare, cheese, family .