According to our statistics of syntactic rule on training data for seven languages, which is based on the automatically predicted parse provided by CoNLL-2009 shared task, the total number of distance tuples in syntactic rule is no more than 120   in these languages except that Japanese is about 260.
based on gold syntax, the top-1 argument pruning for Catalan and Spanish has reached 100 percent coverage (namely, for Catalan and Spanish, all arguments are the children of predicates in gold dependency syntax tree), and hence our syntax-aware model obtains significant gains of 1.43% and 1.35%, respectively.