Triple

Target entity: Siege of Constantinople (717–718)
Context triple: [Sulayman ibn Abd al-Malik, notableCampaign, Siege of Constantinople (717–718)]

• A. Second Arab siege of Constantinople (717–718) chosen
  The Second Arab siege of Constantinople (717–718) was a major early medieval conflict in which the Byzantine Empire successfully repelled a massive Umayyad assault on its capital, halting Arab expansion into Eastern Europe.
• B. Siege of Constantinople (626)
  The Siege of Constantinople in 626 was a major failed joint Avar and Sasanian attempt to capture the Byzantine capital, marking a decisive turning point in the Roman–Persian Wars.
• C. First Arab siege of Constantinople (674–678)
  The First Arab siege of Constantinople (674–678) was a prolonged Umayyad naval and land campaign against the Byzantine capital that ultimately failed, securing the empire’s survival and halting early Islamic expansion into Eastern Europe.
• D. Siege of Adrianople (813)
  The Siege of Adrianople (813) was a major early 9th-century military engagement in which Bulgarian forces under Khan Krum besieged and captured the Byzantine city of Adrianople during the Byzantine–Bulgarian wars.
• E. Siege of Antioch (540)
  The Siege of Antioch (540) was a major Sasanian Persian capture and sack of the prominent Byzantine city of Antioch under King Khosrow I, marking a pivotal moment in the Roman–Persian conflicts of Late Antiquity.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.