Table 3:

Frequency of the most popular semantic types

Rank	Semantic Type	Count	Occurs in Distinct Sigs	Percent of Sigs
1	Quantitative Concept	1543	928	90.7
2	Temporal Concept	1124	923	90.2
3	Biomedical or Dental Material	675	669	65.7
4	Health Care Activity	673	672	65.4
5	Functional Concept	276	239	23.3