Does the sentence "Pain is the most common reason for people to use complementary and alternative medicine." provide a valid answer to the question "What is the most common reason people seek out alternative medicine?" OPTIONS:
- yes
- no

A: yes

Does the sentence "The Ottomans expanded into Europe, reducing Bulgaria to a vassal state by 1366 and taking over Serbia after its defeat at the Battle of Kosovo in 1389." provide a valid answer to the question "Along with the Second Bulgarian Empire and the Kingdom of Serbia, what polity controlled the former Byzantine Balkan lands?" OPTIONS:
- yes
- no

A: no

Does the sentence "The city was also home to the Royal Naval Engineering College; opened in 1880 in Keyham, it trained engineering students for five years before they completed the remaining two years of the course at Greenwich." provide a valid answer to the question "When did the Royal Naval Engineering College shut its doors in Plymouth?" OPTIONS:
- yes
- no

A: no

Does the sentence "The chirigotas are well known witty, satiric popular groups who sing about politics, new times and household topics, wearing the same costume, which they prepare for the whole year." provide a valid answer to the question "What do the chirigotas sing about?" OPTIONS:
- yes
- no

A:
yes