Q: Does "For example, Roman water clocks had different scales for different months of the year: at Rome's latitude the third hour from sunrise, hora tertia, started by modern standards at 09:02 solar time and lasted 44 minutes at the winter solstice, but at the summer solstice it started at 06:58 and lasted 75 minutes." provide a valid answer to "What kind of clocks did the Romans use?"?
A: yes

Q: Does "Because of the movements of Philhellenism and the Diafotismos in the 19th century, which emphasized the modern Greeks' ancient heritage, these foreign influences were excluded from official use via the creation of Katharevousa, a somewhat artificial form of Greek purged of all foreign influence and words, as the official language of the Greek state." provide a valid answer to "What radical political changes occurred during the 19th century ?"?
A: yes

Q: Does "Small-scale "expedition tourism" has existed since 1957 and is currently subject to Antarctic Treaty and Environmental Protocol provisions, but in effect self-regulated by the International Association of Antarctica Tour Operators (IAATO)." provide a valid answer to "Since what year has tourism been ongoing to Antarctica?"?
A: yes

Q: Does "Economist Mark Zandi testified to the Financial Crisis Inquiry Commission in January 2010: "The securitization markets also remain impaired, as investors anticipate more loan losses." provide a valid answer to "What economist testified to the Financial Crisis Inquiry Commission in January 2010?"?
A:
yes