reaction
Transcrição
reaction
REACTION Mário J. Silva REACTION Task 1: Mining Ressources Progress & Plans REACTION Informa1on Mining • Development of robust linguis;c resources to process different types and genres of texts – knowledge resources about media personali;es: recognizing and resolving references to named-‐ en11es; – sen;ment lexicons and grammars: detec1ng the polarity of opinions about relevant personali1es – annotated corpora: training different text classifiers and evalua1ng classifica1on procedures REACTION Mining Resources • POWER -‐ Poli;cal Ontology for Web En;ty Retrieval (enriched) • Sen;Lex-‐PT – Sen1ment Lexicon (refined and enlarged with new sen;ment words and expressions from sports) • Sen;Corpus-‐PT – A sen1ment annotated corpus of tweets targe1ng the Portuguese football players at Euro 2012 (in progress) REACTION POWER enrichement Popula1on of the ontology with poli1cal actors from NEWS using Voxx (SAPO) • For each individual in POWER having a correspondence with a Voxx name, we query the Voxx web service and extract the alterna1ve forms (nicknames and ergonyms) used to men1on that en1ty in media. • The names recognized by Voxx are matched against the names of POWER, using the Jaccard similarity coefficient (Tan, Steinbach & Kumar 2005). Matches with over 25% similarity are considered a candidate associa1on. • We apply a sta1s1cal model to select the most likely among candidates. Only the most likely associa1on obtained in this process is added to the POWER knowledge base. Precision and recall of 97%. The Chi-‐square test of independence indicates a significance level of 0.1% (p-‐value<0.001). autogolo,autogolo.PoS=N;FLEX=ms;TG=HUM:N0;POL:N0=-‐1;ANOT=MAN;DOM=DESP autogolos,autogolo.PoS=N;FLEX=mp;TG=HUM:N0;POL:N0=-‐1;ANOT=MAN;DOM=DESP balázio,balázio.PoS=N;FLEX=ms;TG=HUM:N0;POL:N0=1;ANOT=MAN;DOM=DESP balázios,balázio.PoS=N;FLEX=mp;TG=HUM:N0;POL:N0=1;ANOT=MAN;DOM=DESP boa exibição,boa exibição.PoS=N;FLEX=fs;TG=HUM:N0;POL:N0=1;ANOT=MAN;DOM=DESP boa jogada,boa jogada.PoS=N;FLEX=fs;TG=HUM:N0;POL:N0=1;ANOT=MAN;DOM=DESP boas jogadas,boa jogada.PoS=N;FLEX=fp;TG=HUM:N0;POL:N0=1;ANOT=MAN;DOM=DESP cartão amarelo,cartão amarelo.PoS=N;FLEX=ms;TG=HUM:N0;POL:N0=-‐1;ANOT=MAN;DOM=DESP coxo,coxo.PoS=Adj;FLEX=ms;TG=HUM:N0;POL:N0=-‐1;ANOT=MAN;DOM=DESP coxos,coxo.PoS=Adj;FLEX=mp;TG=HUM:N0;POL:N0=-‐1;ANOT=MAN;DOM=DESP craque,craque.PoS=Adj;FLEX=ms;TG=HUM:N0;POL:N0=1;ANOT=MAN;DOM=DESP craques,craque.PoS=Adj;FLEX=mp;TG=HUM:N0;POL:N0=1;ANOT=MAN;DOM=DESP entrega-‐se ao jogo,entregar-‐se ao jogo.PoS=IDIOM;FLEX=P2s|P4s|P3s| Y2s;TG=HUM:N0;POL:N0=1;ANOT=MAN;DOM=DESP fez falta,fazer falta.PoS=IDIOM.FLEX=J4s|P3s;TG=HUM:N0;POL:N0=-‐1;ANOT=MAN;DOM=DESP fez uma cueca,fazer uma cueca.PoS=IDIOM.FLEX=J4s| P3s;TG=HUM:N0;POL:N0=1;ANOT=MAN;DOM=DESP falhou o penal;,falhar o penal1.PoS=IDIOM.FLEX=J:4s|P: 3s;TG=HUM:N0;POL:N0=-‐1;ANOT=MAN;DOM=DESP REACTION Sen1Lex enlargement REACTION Sen1Lex refinement (work in progress) Human AVachment Index -‐ degree of appropriateness and relevance of an adjec1ve to a human en1ty. General assump;ons: • The greater is the probability of an adjec1ve ending a clause or a sentence the greater will be the probability of being a relevant human modifier. • Relevant human adjec1ves mostly appear in post-‐adnominal posi1on, within an aoribu1ve construc1on. He is crazy. vs He is crazy about soccer. Um jogador perfeito vs. Um perfeito idiota Main goal: Iden1fying the sen1ment predicates that are more relevant(and less noisy) for OM applica1ons. • Manually annotated corpus of tweets targe1ng poli1cians 3000 tweets (2 annotators) IAA >80% More accurate guidelines • Manually annotated corpus of tweets targe1ng football players (work in progress) 1400 tweets (June 2 PT-‐Turkey) Characteriza1on of both collec1ons, par1cularly concerning the expression of sen1ment in each domain. REACTION Sen1Corpus-‐PT POWER ! Crea1on of an interface allowing the visualiza1on of data, in an integrated manner: ! Cita1ons from poli1cians in newspapers (Voxx) ! NER both in conven1onal and social media ! Opinion poli1cal mining in social media, par1cularly in Twioer. Sen1Corpus ! New release (#Euro 2012) ! Contras1ve study (poli1cs vs. football) REACTION Next steps