--7-- 
basis of their tendency to co-occur syntactically with the 
same words in text---cf. Harper, 1965); other classes contain 
words of the same root, synonyms, hypernyms, and words 
arbitrarily classified as "concrete." The semantic classi- 
fications are highly tentative, and are subject to modifi- 
cation. Their extent is shown in Table 2. 
Table 2 
SEMANTIC DATA 
Number of Number of 
Classification Classes Words in Class 
Distributional Classes 22 150 
Hypernym Classes i0 160 
Word Families 25 52 
Synonym--antonym Classes 16 48 
"Concrete" Words I 54 
TOTAL 74 464 
The language materials described above are punched 
on approximately 2500 cards. The data are processed by s 
conversion program in order to form the data base for the 
paragraph generation program