[Q]: Many science fiction works have been set in the 21st century (years 2001 to 2100). With humanity now in the 21st century, many of the predictions of these works have so far been proven obsolete. This page lists only "predictions" regarding the 21st century, as opposed to contemporary accounts of the actual 21st century, which would be too numerous to list. Science fiction novels set in the 21st century are more popular than contemporary accounts of the actual 21st century.
[A]: It's impossible to say

[Q]: Jaana Kunitz, born in Taivalkoski, Finland in 1972, is a professional dance instructor based in San Diego, California. She is married to her dance partner, James Kunitz, and has since retired from competing in ballroom dance competitions to focus on coaching, video production, and dance-fitness programs. Jaana Kunitz and her husband like to ballroom dance.
[A]: It's impossible to say

[Q]: 4th (County Fermanagh) Battalion, Ulster Defence Regiment (4 UDR) was formed in 1970 as part of the 7 original battalions specified in The Ulster Defence Regiment Act 1969, which received Royal Assent on 18 December 1969 and was brought into force on 1 January 1970. It was amalgamated with the 6th Battalion, Ulster Defence Regiment in 1992 to form the 4th/6th Battalion, Ulster Defence Regiment. The Ulster Defence Regiment Act was the last act to receive Royal Assent.
[A]: It's impossible to say

[Q]: In symbolic computation (or computer algebra), at the intersection of mathematics and computer science, the Risch algorithm is an algorithm for indefinite integration. It is used in some computer algebra systems to find antiderivatives. It is named after the American mathematician Robert Henry Risch, a specialist in computer algebra who developed it in 1968. The Risch algorithm as developed before the 1970s
[A]:
Yes