answers: their officers expression of regret for not being able to do something
questions: who are they talking about? what sentiment are they referring to? what was the apology for
paragraph: Apology: "expression of regret for not being able to do something" @kdemoff: "I regretted any offense their officers may have taken."— St. Louis County PD (@stlcountypd) December 2, 2014
questions_answers: question: who are they talking about?, answer: their officers | question: what sentiment are they referring to?, answer: expression of regret | question: what was the apology for, answer: for not being able to do something