Does the sentence "Another theory is that modern humans are the only survivors of several species of primates who may have worn clothes and that clothing may have been used as long ago as 650 thousand years ago." provide a valid answer to the question "What isn't it easy to determine about clothing?"

A: no

Does the sentence "On May 20, USGS seismologist Tom Parsons warned that there is "high risk" of a major M>7 aftershock over the next weeks or months." provide a valid answer to the question "Who warned of possible seismic activity in the area beforehand?"

A: yes

Does the sentence "Nevertheless, 22% of the population claimed social security benefit in 2006/7, most of them aged over 60, a sector that represents 20% of the population." provide a valid answer to the question "What % of households were spending less than 20 per week in 2004"

A: no

Does the sentence "Virgil is said to have recited Books 2, 4, and 6 to Augustus; and Book 6 apparently caused Augustus' sister Octavia to faint." provide a valid answer to the question "Which book supposedly caused Augustus' sister to faint?"

A:
yes