Question: What was the common profession of Piotr Artur Trochowski and Roman Grill?

Context articles: Piotr Trochowski
Piotr Wysz Radoliński
Tajana
George Louis Beer Prize
Z Grill
Legal Profession Admission Board
Black River (band)
Roman Grill
Nurse stereotypes
Convention (meeting)

Piotr Artur Trochowski (] , ] ; born 22 March 1984) is a German professional footballer who plays as an attacking midfielder and is currently unattached to a club.
 According to his FIFA World Cup 2010 profile he is a playmaker known for "his speed, agility, tricky dribbling and refined technique."
Piotr Wysz Radoliński of Leszczyc coat of arms was born circa 1354 in Radolin and died on 30 September 1414 in Poznań.
 He was a bishop of Kraków from 1392, and a bishop of Poznań from 1412.
 A lawyer by profession, he studied in Prague and Padua, where in 1386 he received his doctorate in dual law.
Tajana (also called Tajana Mandal) is a village, situated in Bahawalnagar District, Punjab, Pakistan.
 It consists 500 homes.
 The most common profession of the people is agriculture.
 70% of the total agricultural land depends on rain water.
 There are no other sources of the water there.
The George Louis Beer Prize is a book prize awarded by the American Historical Association for the best book in European international history from 1895 to the present written by a United States citizen or permanent resident.
 The prize was created in 1923 to honor the memory of George Beer, a prominent historian, member of the U.S. delegation at the 1919 Paris Peace Conference and senior League of Nations official.
 Described by Jeffrey Herf, the 1998 laureate, as "the Academy Award" of book prizes for modern European historians.
 It is regarded as one of the most prestigious historical prizes offered in the United States, and it is usually awarded to senior scholars in the profession.
 This in contrary to the American Historical Association's other distinguished European history award, the Herbert Baxter Adams Prize, which is restricted to young authors publishing their first substantial work.
 Only four historians, Edward W. Bennett, Carole Fink, Piotr S. Wandycz and Gerhard Weinberg, have won the Beer Prize more than once in its ninety-year history.
The Benjamin Franklin Z Grill, or simply "Z-Grill", is a 1-cent postage stamp issued by the United States Postal Service in February 1868 depicting Benjamin Franklin.
 While stamps of this design were the common 1-cent stamps of the 1860s, the Z-Grill is distinguished by having the so-called "Z" variety of a grill pressed into the stamp, creating tiny indentations in the paper.
 Although the 1-cent Z-Grill is generally cited as the rarest and most valuable of all US postage stamps, the 15-cent Lincoln Z-Grill is just as rare and the 10-cent Washington Z-Grill scarcely less so.
 All three of these stamps were produced at the same time, along with more common Z-grill versions of the contemporary 2-cent, 3-cent, 5-cent and 12-cent stamps (The earliest known postmarks on Z-grill stamps date from January 1868).
 The "Z" pattern, unique among grill templates used by the Post Office because it incises horizontal ridges into the stamp rather than vertical ridges, was replaced within a very short time, for stamps with the D- and E-Grills were already being postmarked in mid-February.
The Legal Profession Admission Board is the statutory authority responsible for the admission of lawyers in New South Wales.
 It was formerly two separate boards; the Barristers Admission Board and the Solicitors Admission Board.
 The "Legal Profession Act 1993" introduced common admission for both branches of the profession resulting in the merger of the two boards.
Black River was a Polish stoner rock/heavy metal band.
 They were formed in 2008 by Tomasz Wróblewski (bass), Dariusz Brzozowski (drums), Piotr "Kay" Wtulich (guitar), Artur "Art."
 Kempa (guitar), and Maciej Taff (vocals).
Roman Grill (born March 1, 1966) is a German former footballer who is now a player agent.
 A defender, Grill spent eleven years playing for Bayern Munich's reserve team, and made one first-team appearance, replacing Thomas Helmer in a UEFA Cup match against Benfica in December 1995.
 Bayern went on to win the competition that season.
 After retiring, Grill worked as a coach with Bayern's youth team, before starting his own player agency in 2006.
 His clients include Owen Hargreaves, Philipp Lahm and Piotr Trochowski.
A stereotype is a generalized idea or image about a particular person or thing that is often oversimplified and offensive.
 Stereotypes are victim of prejudice when negative portrayals of a group are untrue of individual members.
 Nursing has been stereotyped throughout the history of the profession.
 A common misconception is that all nurses are female; this has led to the stereotype of male nurses as effeminate.
 These generalized ideas of the nursing profession have formed a skewed image of nurses in the media.
 The image of a nurse projected by the media is typically of a young white single female being over-sexualized as well as diminished intellectually; this idea is then portrayed in get-well cards, television shows and novels.
 The over-sexualized nurse is commonly referred to as a naughty nurse and is shown as a sex symbol or nymphomaniac. Along with these common stereotypes, studies have identified several other popular images used in media such as handmaiden, angel, torturer, homosexual male, alcoholic, buffoon and woman in white.
 Common stereotypes of nursing and portrayal of these misconceptions have fueled a discussion on the effects they have on the profession, harmful or good.
A convention, in the sense of a meeting, is a gathering of individuals who meet at an arranged place and time in order to discuss or engage in some common interest.
 The most common conventions are based upon industry, profession, and fandom.
 Trade conventions typically focus on a particular industry or industry segment, and feature keynote speakers, vendor displays, and other information and activities of interest to the event organizers and attendees.
 Professional conventions focus on issues of concern to the profession and advancements in the profession.
 Such conventions are generally organized by societies or communities dedicated to promotion of the topic of interest.
 Fan conventions usually feature displays, shows, and sales based on pop culture and guest celebrities.
 Science fiction conventions traditionally partake of the nature of both professional conventions and fan conventions, with the balance varying from one to another.
 Conventions also exist for various hobbies, such as gaming or model railroads.