Given a question and a context passage, generate the answer having the word or phrase from the context passage. Here, the answer should be a shortest continous span from the passage.

[Q]: Context: Reactive oxygen species are involved in ovulation. The aim of this study was to examine gonadotropin regulation of antioxidant enzyme sulfiredoxin (Srx) and peroxiredoxin 2 (PRDX2) expressions and modification during the ovulatory process in rats. Administration of antioxidants in vivo reduced ovulation rate and cumulus expansion. LH treatment increased H(2)O(2) levels within 15 min, which, in turn, induced Srx gene expression in cultured preovulatory follicles. Treatment of preovulatory follicles with catalase suppressed the stimulatory effect of LH on Akt phosphorylation. LH- or H(2)O(2)-stimulated Srx mRNA levels were suppressed by inhibitors of antioxidant agents and MAPK kinase. An in vivo injection of equine chorionic gonadotropin-human chorionic gonadotropin (hCG) stimulated Srx mRNA within 1 h in granulosa but not thecal cells of preovulatory follicles. Srx protein levels were stimulated from 3 h post-hCG injection. Immunofluorescence analysis revealed that oocytes expressed the Srx protein. Furthermore, hCG treatment increased Srx expression in mural granulosa, theca and cumulus cells, but the Srx protein was not detected in corpora lutea. Gene expression of PRDX2, identified as an Srx-dependent modified enzyme, was stimulated by gonadotropins. In situ hybridization analysis demonstrated that PRDX2 mRNA was detected in oocytes and theca cells as well as granulosa cells of some antral and preovulatory follicles. High levels of PRDX2 mRNA were detected in corpora lutea. Total levels of PRDX2 protein were not changed by gonadotropins. However, levels of hyperoxidized PRDX2 increased within 2-3 h after the hCG injection. Taken together, gonadotropin stimulation of Srx expression and PRDX2 modification in the ovary suggest the existence of an antioxidant system to maintain H(2)O(2) production and elimination during the periovulatory period. 
 Question: What type of enzyme is peroxiredoxin 2 (PRDX2)?
[A]: antioxidant


[Q]: Context: Tobacco companies are fighting efforts in the United States and Australia to make their products less appealing. In Washington, a federal judge last week blocked the Food and Drug Administration from requiring new warning labels on cigarette packs. Judge Richard Leon ruled in a case brought by five tobacco companies. The judge temporarily stopped a new federal rule which requires large new warnings starting next September. These include color1 images such as a dead body or diseased lungs. And simple text warnings now appear. Congress called for color1 images showing the dangers of smoking, similar to what Canada does. But the tobacco companies say the new requirements approved in June violate their free speech rights guaranteed by the Constitution. Judge Leon said the FDA could not require the new labels before a lawsuit against the government is decided. Some experts say the process could take years. The judge said he believed the cigarette makers were highly likely to win their case. He said the images should be designed to appeal to emotions, rejecting government arguments that they should be purely factual. He accused the government of trying to use the labels to promote an "obvious anti-smoking agenda?" The head of an anti-smoking group, the Campaign for Tobacco-Free Kids, called the decision "wrong on the science and wrong on the law". About one-fifth of American adults smoke. The World Health Organization says tobacco kills nearly six mil-lion people worldwide each year. More than six hundred thousand of them are non-smokers who breathe other people's tobacco smoke. In Australia, tobacco companies want to stop what would be the world's most restrictive laws on cigarette advertising. Cigarettes could be sold only in plain olive-green packages. Only the brand name and health warnings could appear. The Senate passed the bill last week and sent it back to the Lower House to approve minor amendments . The law is to go into effect in December of next year. Tobacco companies Say the legislation violates the Australian constitution. They say it would unjustly reduce the value of their brand names and trademarks. Health Minister Nicola Roxon says the government is ready for a legal fight. 
 Question: Which country has adopted color1 images showing the dangers of smoking as warning labels?
[A]: canada.


[Q]: Context: Organisms are individual living things. They range from microscopic bacteria to gigantic blue whales (see Figure must be obtained from the environment. Biotic factors are all of the living or once-living aspects of the environment. They include all the organisms that live there as well as the remains of dead organisms. Abiotic factors are all of the aspects of the environment that have never been alive. They include factors such as sunlight, minerals in soil, temperature, and moisture. Ecologists study organisms and environments at several different levels, from the individual to the biosphere. The levels are depicted in Figure 23.2 and described below. For a video introduction to the levels of organization in ecology, click on this link: . MEDIA Click image to the left or use the URL below. URL: An individual is an organism, or single living thing. A population is a group of individuals of the same species that live in the same area. Members of the same population generally interact with each other. A community is made up of all the populations of all the species that live in the same area. Populations in a community also generally interact with each other. 
 Question: __all the populations of all the species that live in the same area
[A]:
community