Does the sentence "In 944 the Rus' force advanced again on the Greeks, by land and sea, and a Byzantine force from Cherson responded." provide a valid answer to the question "Where did Igor get warriors from after returning to Kiev after being drivin out by the Byzatines?" OPTIONS:
- yes
- no

A: no

Does the sentence "During the Nimrod Expedition led by Ernest Shackleton in 1907, parties led by Edgeworth David became the first to climb Mount Erebus and to reach the South Magnetic Pole." provide a valid answer to the question "What explorer led the Nimrod Expedition into Antarctica?" OPTIONS:
- yes
- no

A: yes

Does the sentence "Young Bell asked what needed to be done at the mill." provide a valid answer to the question "What sort of mill did Bell's neighbors run?" OPTIONS:
- yes
- no

A: no

Does the sentence "Among young adolescents, "heavy" sexual activity, marked by genital stimulation, is often associated with violence, depression, and poor relationship quality." provide a valid answer to the question "What seperates "heavy" sexual activity from other forms of affection?" OPTIONS:
- yes
- no

A:
yes