Before revision:  Analysing the available literature, most of the existing event detection methods are only focused on statistical and syntactical features in data , even though the underlying semantics are also important for an effective information retrieval from text , because they describe the connections between words and their meanings.
After revision:  Analysing the available literature, most of the existing event detection methods are only focused on statistical and syntactical features in data and lacked the involvement of underlying semantics which are important for effective information retrieval from text , because they describe the connections between words and their meanings.