*Question*
Information: - Astronomy is a natural science that studies celestial objects and phenomena. It applies mathematics, physics, and chemistry, in an effort to explain the origin of those objects and phenomena and their evolution. Objects of interest include planets, moons, stars, galaxies, and comets; while the phenomena include supernovae explosions, gamma ray bursts, and cosmic microwave background radiation. More generally, all astronomical phenomena that originate outside Earth's atmosphere are within the purview of astronomy. A related but distinct subject, physical cosmology, is concerned with the study of the Universe as a whole. - The Maksutov (also called a "Mak") is a catadioptric telescope design that combines a spherical mirror with a weakly negative meniscus lens in a design that takes advantage of all the surfaces being nearly "spherically symmetrical". The negative lens is usually full diameter and placed at the entrance pupil of the telescope (commonly called a "corrector plate" or "meniscus corrector shell"). The design corrects the problems of off-axis aberrations such as coma found in reflecting telescopes while also correcting chromatic aberration. It was patented in 1941 by Russian optician Dmitri Dmitrievich Maksutov. Maksutov based his design on the idea behind the Schmidt camera of using the spherical errors of a negative lens to correct the opposite errors in a spherical primary mirror. The design is most commonly seen in a Cassegrain variation, with an integrated secondary, that can use all-spherical elements, thereby simplifying fabrication. Maksutov telescopes have been sold on the amateur market since the 1950s. - Amateur astronomy is a hobby whose participants enjoy watching the sky, and the abundance of objects found in it with the unaided eye, binoculars, or telescopes. Even though scientific research is not their main goal, many amateur astronomers make a contribution to astronomy by monitoring variable stars, tracking asteroids and discovering transient objects, such as comets and novae. - A reflecting telescope (also called a reflector) is an optical telescope which uses a single or combination of curved mirrors that reflect light and form an image. The reflecting telescope was invented in the 17th century as an alternative to the refracting telescope which, at that time, was a design that suffered from severe chromatic aberration. Although reflecting telescopes produce other types of optical aberrations, it is a design that allows for very large diameter objectives. Almost all of the major telescopes used in astronomy research are reflectors. Reflecting telescopes come in many design variations and may employ extra optical elements to improve image quality or place the image in a mechanically advantageous position. Since reflecting telescopes use mirrors, the design is sometimes referred to as a "catoptric" telescope. - John F. Gregory ( 1927 -- November 14 , 2009 ) was an American optical engineer and a popularizer of amateur telescope making . He is credited with the design of a version of the Maksutov telescope called the '' Gregory - Maksutov telescope '' . - Amateur telescope making is the activity of building telescopes as a hobby, as opposed to being a paid professional. Amateur telescope makers (sometimes called ATMs) build their instruments for personal enjoyment of a technical challenge, as a way to obtain an inexpensive or personally customized telescope, or as a research tool in the field of astronomy. Amateur telescope makers are usually a sub-group in the field of amateur astronomy. After reading the paragraphs above, we are interested in knowing the entity with which 'john f. gregory' exhibits the relationship of 'occupation'. Find the answer from the choices below. Choices: - major - optician - pupil - research - science
**Answer**
optician

*Question*
Information: - Professor (commonly abbreviated as "prof.") is an academic rank at universities and other post-secondary education and research institutions in most countries. Literally, "professor" derives from Latin as a "person who professes" being usually an expert in arts or sciences, a teacher of the highest rank. - The UCL Ear Institute is an academic department of the Faculty of Brain Sciences of University College London (UCL) located in Gray's Inn Road in the Bloomsbury district of Central London, England, next to the Royal National Throat, Nose and Ear Hospital, the UK's largest ear, nose and throat hospital. - The Royal National Throat, Nose and Ear Hospital (the RNTNEH) is a specialist otolaryngologic hospital located on the Gray's Inn Road in London, United Kingdom, and a part of the University College London Hospitals NHS Foundation Trust. Established in 1874, its motto is "Audient surdi mutique loquentur" (the deaf shall hear and the mute shall speak). - Bloomsbury is an area in the West End, central London, forming part of the London Borough of Camden and located between Euston Road and Holborn. It was developed by the Russell family in the 17th and 18th centuries into a fashionable residential area. It is notable for its array of garden squares, literary connections (exemplified by the Bloomsbury Group), and numerous cultural, educational and health-care institutions. Although Bloomsbury was not the first area of London to have acquired a formal square, Bloomsbury Square, laid out in 1660 by Thomas Wriothesley, 4th Earl of Southampton, as Southampton Square was the first square to be named as such. Much of the district was planned and built by James Burton. - Central London is the innermost part of London, England. There is no official definition of its area but its characteristics are understood to include a high density built environment, high land values, an elevated daytime population and a concentration of regionally, nationally and internationally significant organisations and facilities. Over time a number of definitions have been used to define the scope of central London for statistics, urban planning and local government. - David Thomas Kemp ( born 24 February 1945 ) FRS is a Professor working at the UCL Ear Institute . He was educated at King 's College London ( BSc , 1966 ; AKC ; PhD , 1970 ) . He discovered the phenomenon of otoacoustic emission in July 1978 while working at the Royal National Throat Nose and Ear Hospital . He founded a company that makes equipment to test for hearing defects by detecting otacoustic emission , which is absent in the ears of people suffering deafness caused by neural impairment . Because the method does not require any cooperation from the subject , it is valuable for detecting deafness in babies . He was elected a Fellow of the Royal Society in 2004 . After reading the paragraphs above, we are interested in knowing the entity with which 'david kemp ' exhibits the relationship of 'employer'. Find the answer from the choices below. Choices: - care - professor - time - university college london
**Answer**
university college london