Although the syntactic method showed lower precision of the extracted facts (61% vs. 68%), in spite of parsing errors the recall was higher than that of the surface-based method, judging by the number of correctly answered questions (31% vs. 23%).
the syntactic analysis can in fact be considered as another, intensive way of improving the recall of information extraction, in addition to successfully used extensive ways, such as developing larger numbers of surface patterns or increasing the size of the collection.