Does "Richard Sander claims that by artificially elevating minority students into schools they otherwise would not be capable of attending, this discourages them and tends to engender failure and high dropout rates for these students." contain the correct answer to "What was a negative effect of affirmative action according to Richard Sander?"

A: yes

Does "Tibet continued as a Central Asian empire until the mid-9th century, when a civil war over succession led to the collapse of imperial Tibet." contain the correct answer to "When did a civil war over succession lead to the collapse of imperial Tibet?"

A: yes

Does "Trying to avoid the scenes that marred the relay in the UK, France and the US, the city government designed a complex security operative to protect the torch relay, involving 1200 police officers and 3000 other people, including public employees and volunteers." contain the correct answer to "How many police officers were part of the security operative?"

A:
yes