Problem: Energy:

In particle physics, this inequality permits a qualitative understanding of virtual particles which carry momentum, exchange by which and with real particles, is responsible for the creation of all known fundamental forces (more accurately known as fundamental interactions). Virtual photons (which are simply lowest quantum mechanical energy state of photons) are also responsible for electrostatic interaction between electric charges (which results in Coulomb law), for spontaneous radiative decay of exited atomic and nuclear states, for the Casimir force, for van der Waals bond forces and some other observable phenomena.

What are simply lowest quantum mechanical energy state of photons?
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A: Virtual photons

Problem: Ferdinand refused and went to Valencia instead of Madrid. Here, on 17 April, General Elio invited the King to reclaim his absolute rights and put his troops at the King's disposition. The king abolished the Constitution of 1812. He followed this act by dissolving the two chambers of the Spanish Parliament on 10 May. Thus began six years (18141820) of absolutist rule, but the constitution was reinstated during the Trienio Liberal, a period of three years of liberal government in Spain from 18201823.
When was the Trieno Liberal?
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Answer: 18201823

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
In Apollo's role as a healer, his appellations included Acesius (/sis/ -SEE-zhs; , Akesios, from , "healing"), Acestor (/sstr/ -SES-tr; , Akestor, literally "healer"), Paean (/pin/ PEE-n; , Paian, from , "to touch"),[citation needed] and Iatrus (/atrs/ eye-AT-rs; , Iatros, literally "physician"). Acesius was the epithet of Apollo worshipped in Elis, where he had a temple in the agora. The Romans referred to Apollo as Medicus (/mdks/ MED-i-ks; literally "physician" in Latin) in this respect. A temple was dedicated to Apollo Medicus at Rome, probably next to the temple of Bellona.
Where did Apollo have a temple in the agora?
A: Elis

Context and question: Sacrifice to deities of the heavens (di superi, "gods above") was performed in daylight, and under the public gaze. Deities of the upper heavens required white, infertile victims of their own sex: Juno a white heifer (possibly a white cow); Jupiter a white, castrated ox (bos mas) for the annual oath-taking by the consuls. Di superi with strong connections to the earth, such as Mars, Janus, Neptune and various genii including the Emperor's were offered fertile victims. After the sacrifice, a banquet was held; in state cults, the images of honoured deities took pride of place on banqueting couches and by means of the sacrificial fire consumed their proper portion (exta, the innards). Rome's officials and priests reclined in order of precedence alongside and ate the meat; lesser citizens may have had to provide their own.
When did the sacrifices to the deities of the heavens occur?
Answer: daylight

Question: The DIN system, officially DIN standard 4512 by Deutsches Institut fur Normung (but still named Deutscher Normenausschu (DNA) at this time), was published in January 1934. It grew out of drafts for a standardized method of sensitometry put forward by Deutscher Normenausschu fur Phototechnik as proposed by the committee for sensitometry of the Deutsche Gesellschaft fur photographische Forschung since 1930 and presented by Robert Luther (de) (18681945) and Emanuel Goldberg (18811970) at the influential VIII. International Congress of Photography (German: Internationaler Kongre fur wissenschaftliche und angewandte Photographie) held in Dresden from August 3 to 8, 1931.
Is there an answer to this question: Who founded the VIII. International Congress of Photography?

Answer: unanswerable

The book value of the company nearly doubled from $8.19 a share in 1999 to $15 a share in 2009. Revenues grew sixfold from 1999's $6 billion to almost $36 billion in 2009. Net profit margin rose from 4.2% in 1999 to 8.4% in 2009, with operating margins improving 31 percent and return on equity doubling to 6.7 percent in the same time span. Between 1999 and 2009, return on capital nearly tripled to 7 percent. Comcast reported first quarter 2012 profit increases of 30% due to increase in high-speed internet customers. In February 2014, Comcast generated 1.1 billion in revenue during the first quarter due to the Sochi Olympics,.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What sports event caused revenues to double from 1999 to 2009?
Ah, so..
unanswerable