In this task, you are given a question and a context passage. You have to answer the question based on the given passage.

[Q]: What is the area of expertise of scientists who want to measure radiance from vegetation canopies?, Context: Oxygen presents two spectrophotometric absorption bands peaking at the wavelengths 687 and 760 nm. Some remote sensing scientists have proposed using the measurement of the radiance coming from vegetation canopies in those bands to characterize plant health status from a satellite platform. This approach exploits the fact that in those bands it is possible to discriminate the vegetation's reflectance from its fluorescence, which is much weaker. The measurement is technically difficult owing to the low signal-to-noise ratio and the physical structure of vegetation; but it has been proposed as a possible method of monitoring the carbon cycle from satellites on a global scale.
[A]: remote sensing

[Q]: Despite meeting some of the requirements such as being surrounded by a body of water, Australia is commonly cited to be too large to be called a what?, Context: Non-Australian citizens who are Australian permanent residents should be aware that during their stay on Norfolk Island they are "outside of Australia" for the purposes of the Migration Act. This means that not only will they need a still-valid migrant visa or Resident return visa to return from Norfolk Island to the mainland, but also the time spent in Norfolk Island will not be counted for satisfying the residence requirement for obtaining a Resident return visa in the future. On the other hand, as far as Australian nationality law is concerned, Norfolk Island is a part of Australia, and any time spent by an Australian permanent resident on Norfolk Island will count as time spent in Australia for the purpose of applying for Australian citizenship.
[A]: Island

[Q]: Where do people meet to drink, Context: A "country pub" by tradition is a rural public house. However, the distinctive culture surrounding country pubs, that of functioning as a social centre for a village and rural community, has been changing over the last thirty or so years. In the past, many rural pubs provided opportunities for country folk to meet and exchange (often local) news, while othersespecially those away from village centresexisted for the general purpose, before the advent of motor transport, of serving travellers as coaching inns.
[A]:
country pub