Does the sentence "He kept the "power" ministries happy by promoting KGB Head Viktor Chebrikov from candidate to full member and appointing Minister of Defence Marshal Sergei Sokolov as a Politburo candidate." provide a valid answer to the question "Who was General Secretary prior to Mikhail Gorbachev?"

A: no

Does the sentence "However, Croatian linguist Snjezana Kordic has been leading an academic discussion on that issue in the Croatian journal Knjizevna republika from 2001 to 2010." provide a valid answer to the question "Which Croatian linguist agrees with Igor Mandic and feels that Serbo-Croatian language is pluricentric?"

A: yes

Does the sentence "The channel also introduced the science fiction show Doctor Who on 23 November 1963 - at 17:16 - which went on to become one of Britain's most iconic and beloved television programmes." provide a valid answer to the question "What program debuted on November 23, 1963?"

A: yes

Does the sentence "Plymouth also has 71 state primary phase schools, 13 state secondary schools, eight special schools and three selective state grammar schools, Devonport High School for Girls, Devonport High School for Boys and Plymouth High School for Girls." provide a valid answer to the question "Aside from Plymouth High School for Girls and Devonport High School for Boys, what state grammar school is present in Plymouth?"

A:
yes