Find the number of authors of the paper 'An Efficient Approach to Semantic Segmentation'.
Mention the number of authors of the paper 'An Efficient Approach to Semantic Segmentation'.
SELECT ?answer WHERE { <https://dblp.org/rec/journals/ijcv/CsurkaP11> <https://dblp.org/rdf/schema#numberOfCreators> ?answer }
<https://dblp.org/rec/journals/ijcv/CsurkaP11>