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.

[EX Q]: Context: In the county, the population was spread out with 23.5% under the age of 18, 7.8% from 18 to 24, 28.5% from 25 to 44, 25.9% from 45 to 64, and 14.2% who were 65 years of age or older. The median age was 40 years. For every 100 females, there were 93.8 males. For every 100 females age 18 and over, there were 90.5 males. 
 Question: Which age group had the third most people?
[EX A]: under the age of 18

[EX Q]: Context: NADPH oxidase (Nox) family enzymes are one of the main sources of cellular reactive oxygen species (ROS), which have been shown to function as second messenger molecules. To date, seven members of this family have been reported, including Nox1-5 and Duox1 and -2. With the exception of Nox2, the regulation of the Nox enzymes is still poorly understood. Nox1 is highly expressed in the colon, and it requires two cytosolic regulators, NoxO1 and NoxA1, as well as the binding of Rac1 GTPase, for its activity. In this study, we investigate the role of the tyrosine kinase c-Src in the regulation of ROS formation by Nox1. We show that c-Src induces Nox1-mediated ROS generation in the HT29 human colon carcinoma cell line through a Rac-dependent mechanism. Treatment of HT29 cells with the Src inhibitor PP2, expression of a kinase-inactive form of c-Src, and c-Src depletion by small interfering RNA (siRNA) reduce both ROS generation and the levels of active Rac1. This is associated with decreased Src-mediated phosphorylation and activation of the Rac1-guanine nucleotide exchange factor Vav2. Consistent with this, Vav2 siRNA that specifically reduces endogenous Vav2 protein is able to dramatically decrease Nox1-dependent ROS generation and abolish c-Src-induced Nox1 activity. Together, these results establish c-Src as an important regulator of Nox1 activity, and they may provide insight into the mechanisms of tumor formation in colon cancers. 
 Question: Which NADPH oxidase family member requires interaction with NOXO1 for function?
[EX A]: nadph oxidase 1

[EX Q]: Context: The Dolphins' eighth game was an AFC duel with the Ravens. The Dolphins trailed early after QB Joe Flacco completed a 32-yard TD pass to RB Willis McGahee. They replied with RB Ronnie Brown getting a 12-yard TD run. The Ravens got the lead back after kicker Billy Cundiff made a 26 and a 39-yard field goal. The Dolphins narrowed the lead with kicker Dan Carpenter nailing a 19-yard field goal. The Dolphins fell further behind after Flacco found WR Derrick Mason on a 12-yard TD pass. This was followed in the 4th quarter by Cundiff hitting a 20 and a 24-yard field goal. 
 Question: Who scored the longest touchdown?
[EX A]:
willis mcgahee