Q: Does "The small shelly fossil Cloudina, from 549 to 542 million years ago, has been classified by some authors as an annelid, but by others as a cnidarian (i.e. in the phylum to which jellyfish and sea anemones belong)." provide a valid answer to "When did Cloudina exist?"?
A: yes

Q: Does "Disadvantages of electric traction include high capital costs that may be uneconomic on lightly trafficked routes; a relative lack of flexibility since electric trains need electrified tracks or onboard supercapacitors and charging infrastructure at stations; and a vulnerability to power interruptions." provide a valid answer to "What issue can complicate electric railway service?"?
A: no

Q: Does "Prior to the announcement of the winner, season five finalist Ace Young proposed marriage to season three runner-up Diana DeGarmo on stage which she accepted." provide a valid answer to "Who won this season of Idol?"?
A: no

Q: Does "Direct access to Facebook has been blocked in Iran since the 2009 Iranian presidential election protests, due to organization of the opposition movements on the website; but however, Facebook has around 12 to 17 million users in Iran who are using virtual private networks and proxy servers to access the website." provide a valid answer to "What percentage of Iran's population were internet users in 2014?"?
A:
no