In 2007, how many papers did the authors of 'Crystal: Analyzing Predictive Opinions on the Web' publish?
Count the papers published by the authors of 'Crystal: Analyzing Predictive Opinions on the Web' in 2007.
SELECT DISTINCT (COUNT(?answer) AS ?count) WHERE { <https://dblp.org/rec/conf/emnlp/KimH07> <https://dblp.org/rdf/schema#authoredBy> ?x . ?answer <https://dblp.org/rdf/schema#authoredBy> ?x . ?answer <https://dblp.org/rdf/schema#yearOfPublication> '2007' }
<https://dblp.org/rec/conf/emnlp/KimH07>