Input: Read this: Many mailbox providers are also access providers, while others are not (e.g., Yahoo! Mail, Outlook.com, Gmail, AOL Mail, Po box). The definition given in RFC 6650 covers email hosting services, as well as the relevant department of companies, universities, organizations, groups, and individuals that manage their mail servers themselves. The task is typically accomplished by implementing Simple Mail Transfer Protocol (SMTP) and possibly providing access to messages through Internet Message Access Protocol (IMAP), the Post Office Protocol, Webmail, or a proprietary protocol.
Question: All mailbox providers were also what?

Output: unanswerable

Input: Read this: In an interrogative main clause the usual word order is: conjugated verb followed by subject; other verbs in final position: "Kun jij je pen niet vinden?" (literally "Can you your pen not find?") "Can't you find your pen?"
In the Dutch equivalent of a wh-question the word order is: interrogative pronoun (or expression) + conjugated verb + subject; other verbs in final position: "Waarom kun jij je pen niet vinden?" ("Why can you your pen not find?") "Why can't you find your pen?""
In a tag question the word order is the same as in a declarative clause: "Jij kunt je pen niet vinden?" ("You can your pen not find?") "You can't find your pen?""
A subordinate clause does not change its word order: "Kun jij je pen niet vinden omdat het veel te donker is?" ("Can you your pen not find because it far too dark is?") "Can you not find your pen because it's too dark?""
Question: What never changes in a subordinate clause in Dutch?

Output: word order

Input: Read this: 15th Street starts at FDR Drive, and 16th Street starts at a dead end half way between FDR Drive and Avenue C. They are both stopped at Avenue C and continue from First Avenue to West Street, stopped again at Union Square, and 16th Street also pauses at Stuyvesant Square.
Question: Which road starts at a dead end half way between FDR Drive and Avenue C?

Output: 16th Street

Input: Read this: The Vietnam War was a war fought between 1959 and 1975 on the ground in South Vietnam and bordering areas of Cambodia and Laos (see Secret War) and in the strategic bombing (see Operation Rolling Thunder) of North Vietnam. American advisors came in the late 1950s to help the RVN (Republic of Vietnam) combat Communist insurgents known as "Viet Cong." Major American military involvement began in 1964, after Congress provided President Lyndon B. Johnson with blanket approval for presidential use of force in the Gulf of Tonkin Resolution.
Question: When was the Chinese War fought?

Output:
unanswerable