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SemEval 2015 Task 11: Sentiment Analysis of Figurative Language in Twitter

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This presentation summarizes the objectives and evaluation of the SemEval 2015 task on the sentiment analysis of figurative language on Twitter (Task 11). This is the first sentiment analysis task wholly dedicated to analyzing figurative language on Twitter. Specifically, three broad classes of figurative language are considered: irony, sarcasm and metaphor. Gold standard sets of 8000 training tweets and 4000 test tweets were annotated using workers on the crowdsourcing platform CrowdFlower. Participating systems were required to provide a fine-grained sentiment score on an 11-point scale (-5 to +5, including 0 for neutral intent) for each tweet, and systems were evaluated against the gold standard using both a Cosine-similarity and a Mean-Squared-Error measure

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SemEval 2015 Task 11: Sentiment Analysis of Figurative Language in Twitter

  1. 1. Aniruddha Ghosh, Guofu LI, A 9 Tony Veale, Q a; Paolo Rosso, ' Ekaterlna Shutova, John Barnden, Antonio Reyes ÉÎCQEBBÉ 8®fi5 Îffia 2m Sentiment Analysis of Figurative Language in Twitter
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  6. 6. use ata nwpeîm sentì mi scale Ì; natafîan 1 " v1 ‘A a 7.4 1 "1" T’ r ‘V Vfarîîmezgraîneîàî
  7. 7. ’ v*n " *’* T ' <m > (lîf"ì î ÀZFFÌ l 1192 2 t (000100 weìghtìnîugîor 0000000 speakers) " ‘ 0"" x“. ("‘î: " I; “. ‘IÎ = Î,Γ. ' ‘g ì ti .0} 0 x .9 V) t: Al Ayxfì( «t 41 . 19"09) 43,000» 33,0003 031.100900 ‘t- 00.40000005: 0001i- 2000-01 _:
  8. 8. UL«; L1u 0 m , w î. t: 2/ tua z: 1 0. 0 013000». Q 3 0 8,000 training tweets V 4,000 test tweets Tria! data ìnterspersed as "gold" questions Scammers detected, relìability estìmated
  9. 9. r’ 4 . ‘ «‘{î‘ x ‘fiwfip *' T“( -» * ‘ " “ L. o ‘o — —(——— 1.4 À—— A‘ /0‘"—— ‘ ‘Ì Hgttgtttxtxlîgfiw 3 5,1. ÎÎHH M1 43300 x": m‘ , f:"'4"" , <= îvJJJJJa< «Ìw x flàfldmfiffl/ exwjyìgfafiegflwflfw îfiî
  10. 10. Ai, - = Auuotatîou by raterì tor tweeti muti) = standard devîatîononratîngs tor tweet i x‘VV‘0‘VU0‘WVMV‘VK L7»"“_‘λ'A VMV‘ H w, “‘ Ùì W‘U‘V“ x‘ “‘“ "twV" , ‘ '_», k_'_ , .x, , ,x, , 0K x, x ‘. ,., . x, Kx. , ‘. , ., ‘‘_ x
  11. 11. c QìaULÉZLZLìaLMLA g L-LÈ" ÙVÎ_ÎC’. L'LELÎ v r; z , .. ‘ "r ' , _, v ‘ ‘w ‘ g‘ * ' ‘ . ‘ M “ u J‘ ‘u i y J ' 4 4 ‘a/ "îj H. .. _ ' * « — x‘ ì. f/ K/ "‘— «NXÎW ‘a, ‘ «x "v/ g/ îc‘ ‘< ‘a
  12. 12. Sarcasm 557 _| 94 g: ' Sarcasm snîix, ‘ qliflulîh . Irony m0 _l 35 I 5000 m . r0 _2 Metaphor 258 -0.34 M ny I000 '25 etaPhor 4.70 Overall |025 g‘ 2000 . . . gvera/ I ‘9-54 '15: "4 | w|"-‘v 8000 . h". O6 Sarcasm l 200 -2.02 rony 800 - a7 , ' , Ì&@‘ ‘z { Metaphor 800 —0.77 5’ Fk/ g g, P) Y, 3%, »— , Other 200 02s 0 qv V K“ - 4000 -".2’ V V h - SV-mrîiiìr-Jiììî zrw
  13. 13. Two Evaluatìon Metrica agaìnst Human Ratîngs Compare vectors Linea; - Penalty oî Sentiment scores îor Missîng Score:
  14. 14. 0Mixw/ Xvz/ mrzz/ ZÎ%IÒKI<*‘ÎJI5»2’JKÎ’7JW xi/ wz/ v 4:: gkmafiajpihx: in. nJ/ L 2m 38509015‘: zîllîlijpflîîfÎìfiîî-IU
  15. 15. So how well does performance on iust one kîudoî tweet predìct performance overall? 000005302
  16. 16. P‘. ‘*'r‘. ‘”‘7‘{” 52.1‘ W h‘ ‘r ÙÌÉ/ ‘Hvra’ n.1’ Îb nr , , q"; ‘MQ r; fiìrml“. n72 r 1a” , ‘F; > "T ‘ ‘îì €71 51 r! ‘ 2;‘! ,12 ÎÎÉJ 11 07W! 1.1 Il 5x1 i! JJ r» 12100 À; E. ) J! kîìì ÀfiDÎ 5J‘ ‘e [e '13 ‘j ‘ l M * L99111 _1 ì? Wîkînxaa “Hm. 1 ' ' u‘ “b _ ) ; ,s‘‘ì° i‘ vhîx“ V xx. / ; . . . __j/ Fme-granned sentzment ratmgs Breadly Segmented Tweet Ccrpcra * Wellspreserrved corpus " , fior Future Use î ‘g e a , , , 4.. - r“ r‘ . v l! Î
  17. 17. / 0011.102024 e «v ‘ . Ì ‘L I N‘ .4 4| g» ‘V I’ r ‘ e i W v — Ì‘ ì "t! overcome r . ‘Ì 0 Iìîlìgh, UPÎÎtîìîklknîlflîraflw, ‘ "’«. l', I'—)Î*‘x‘; ,Α1'-)inl3F“1!î‘4‘IrL. ‘Î' ì'<rsizm. .zxììc z

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