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Seeing Things from a Different Angle: Discovering Diverse Perspectives about Claims

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Seeing Things from a Different Angle: Discovering Diverse Perspectives about Claims

  1. 1. SEEING THINGS FROM A DIFFERENT ANGLE: DISCOVERING DIVERSE PERSPECTIVES ABOUT CLAIMS SIHAO CHEN, DANIEL KHASHABI, WENPENG YIN, CHRIS CALLISON-BURCH, DAN ROTH D2 ANDO NAACL 2019 1
  2. 2. ARGUMENT MINING 2 • / Stance https://www.atelier-roi.co.jp/the-uses-of-argument/
  3. 3. • Warrant, Data Warrant, Perspective( ), Premise, Reason … Reason Warrant Premise (Eemeren + 1987 ?) (Habernal + 2018) Term • Backing Evidence ARGUMENT MINING 3 Warrant Premise (Freeman 2011)
  4. 4. 4 Topic Claim Reason Stance Oppose Support Backing Stance Oppose Support Topic Reason ClaimWarrant Premise Backing
  5. 5. 5
  6. 6. EVIDENCE • (Aharoni+ 2014) Reason 1,392, Evidence: 1,291 • Web (debate ) (Wachsmuth+ 2017) 6 Claim Evidence
  7. 7. CONTRIBUTION • • Perspective • Claim • Perspective • Perspective • Perspective Stance • Perspective Evidence 7 Perspective Reason Claim Reason
  8. 8. • idebate.com debatewise.org procon.org • 1k claim 8k Perspective 8k Evidence 8
  9. 9. • Mturk Support Oppose 4 + invalid perspective • 10(Claim + perspective) 3 Worker ρ≥0.5 • 10 Claims Perspective Worker 94% • Perspective 8,135 → 4,652 9
  10. 10. • Mturk Perspective • Mturk • Perspective • Perspective 4,652 + 4,567 10
  11. 11. WEB • Bing Claim+Perspective 10 • Mturk • Perspective 4,652 + 4,567 +2,427 11
  12. 12. • Claim Perspective • Perspective • 350 Claim Perspective 12
  13. 13. EVIDENCE • Evidence 8 Perspective Mturk Evidence Perspective • 4 20 Evidences • 87.7% 13
  14. 14. • Mturk Claim World, Politics, Society 14
  15. 15. Train / dev / test = 60 / 15 / 25 • IR Perspective Evidence • BERT • 15
  16. 16. T1: Perspective T2: Perspective Stance T3: Perspective T4: Perspective Evidence 16 IR TOP60 IR TOP15
  17. 17. • • • Evidence • • IR 17

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