Figure 3
![Figure 3](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1471-2105-12-69/MediaObjects/12859_2010_Article_4443_Fig3_HTML.jpg)
Comparison of the three schemes in terms of manual annotations. The figure shows pairwise interpretation of categories of one scheme in terms of the categories of the other: S2 to S1 mapping in A, S3 to S1 mapping in B and S3 to S2 mapping in C.