Exploiting Language Models to Classify Events from Twitter

Table 5

Sample of similarities calculated by the proposed methods and the tf-df method.

Tweets	tf-df	tf-df + ConceptNet	tf-df + LDA-SP
: Amy Winehouse has passed away aged 27.; : Amy Winehouse found death at her home in North London.	0.16	0.365	0.4
: Amy Winehouse has passed away aged 27.; : Nelson Mandela, who led the peaceful transition from white-only rule, has died aged 95.	0.123	0.078	0.084
: Amy Winehouse found death at her home in North London.; : plane crash kills majority of KHL team Lokomotiv.	0	0	0
: plane crash kills majority of KHL team Lokomotiv.; : plane crash in Russia kills 36 or 37 assumed to be hockey player.	0.433	0.452	0.468
: plane crash in Russia kills 36 or 37 assumed to be hockey player.; : plane crash, helicopter, was in Moscow with 2 dead.	0.272	0.146	0.104