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: Monitoring global warming usually requires a Ph. D. and enough maths to glaze your eyes. But that Francisco Lopez and Ruby Nostrant track what climate change is doing to five different plants in Tucson, Arizona and they are only in the second grade. "We are collecting data because the weather is changing and the plants are blooming," Ruby explained. Scores of other students at Borton Primary Magnet School and Sunnyside High School in Tucson are heading outdoors to be part of a new scientific push to figure out how the biological timing of the earth is changing. It's a research project that the average person, even a kindergartner, can join in. The National Phenology Network is calling on volunteers to help track early spring blooms and eventually changes in animals caused by global warming. It's called Project Budburst. When it was first open to the public last year, thousands of people participated in 26 states. "All people can contribute to it by tracking the timing of flowering events or leaf-out events for plants and animals in their backyard," said Phenology Network director Jake Weltzin. He calls the volunteers "citizen-scientists." The idea is that tracking flowers blooming--especially lilacs ; which everyday people have helped track for decades--is fairly simple. The Website [Link] citizen _ science/budburst/index.html gives directions on what to look for in different parts of the country. University of Maryland professor David Inouye said it's so easy to figure out what's blooming that a lack of special knowledge isn't a problem. University of Arizona ecology graduate student Lisa Benton coordinated the Tucson high school students as they looked at plants five minutes from their high school. Each student has specific guidelines and she's been happy so far with the data she is getting. For his part, second-grader Francisco said he had fun helping out. "I like going out in the desert," he said. "I want to be an Einstein." 
 Question: Who is primary school student joining in the Project Budburst?
[EX A]: francisco lopez.

[EX Q]: Context: In the county, the population was spread out with 23.20% under the age of 18, 7.70% from 18 to 24, 27.00% from 25 to 44, 28.00% from 45 to 64, and 14.10% who were 65 years of age or older. The median age was 40 years. For every 100 females, there were 97.00 males. For every 100 females age 18 and over, there were 96.40 males. 
 Question: Which age group is smaller: 25 to 44 or 45 to 64?
[EX A]: 25 to 44

[EX Q]: Context: In many genomic studies, one works with genome-position-dependent data, e.g. ChIP-chip or ChIP-Seq scores. Using conventional tools, it can be difficult to get a good feel for the data, especially the distribution of features. This article argues that the so-called Hilbert curve visualization can complement genome browsers and help to get further insights into the structure of one's data. This is demonstrated with examples from different use cases. An open-source application, called HilbertVis, is presented that allows the user to produce and interactively explore such plots. [Link] 
 Question: Which R/bioconductor package utilizes the Hilbert curve in order to visualize genomic data?
[EX A]:
hilbertvis