Question: Continental Association was system created by the meeting of delegates who gathered in what city?

Context paragraphs:
African Championships in Athletics: The African Championships in Athletics is a continental athletics event organized by the Confederation of African Athletics (CAA), the continental association for the sport in Africa.  Since its inaugural edition in 1979 it was at first organised intermittently with nine editions held in fourteen years until 1993.  Following the tenth edition in 1996 it has been organised biennially on even years, and is always held in the same year as the Summer Olympics.  The latest 20th edition was held in Durban, South Africa in June 2016.

Continental Association: The Continental Association, often known simply as the "Association", was a system created by the First Continental Congress in 1774 for implementing a trade boycott with Great Britain.  Congress hoped that by imposing economic sanctions, they would pressure Great Britain into redressing the grievances of the colonies, in particular repealing the Intolerable Acts passed by the British Parliament.  The Association aimed to alter Britain's policies towards the colonies without severing allegiance.

Confederation of African Athletics: The Confederation of African Athletics (CAA) (also known by its French name Confédération Africaine d'Athlétisme) is the continental association for the sport of athletics in Africa.  It is headquartered in Senegal.  It organises the African Championships in Athletics and other continental competitions.  The body's president is Hamad Kalkaba Malboum of Cameroon.

First Continental Congress: The First Continental Congress was a meeting of delegates from twelve of the Thirteen Colonies who met from September 5 to October 26, 1774 at Carpenters' Hall in Philadelphia, Pennsylvania early in the American Revolution.  It was called in response to the Intolerable Acts passed by the British Parliament, which the British referred to as the Coercive Acts, with which the British intended to punish Massachusetts for the Boston Tea Party.

John Morton (politician): John Morton (1725 – April 1, 1777) was a farmer, surveyor, and jurist from the Province of Pennsylvania and a Founding Father of the United States.  As a delegate to the Continental Congress during the American Revolution, he was a signatory to the Continental Association and the United States Declaration of Independence.  Morton provided the swing vote that allowed Pennsylvania to vote in favor of the United States Declaration of Independence.  Morton chaired the committee that wrote the Articles of Confederation.

Committee of Sixty: The Committee of Sixty or Committee of Observation was a committee of inspection formed in the City and County of New York (Manhattan, New York City), in 1775, by rebels to enforce the Continental Association, a boycott of British goods enacted by the First Continental Congress.  It was the successor to the Committee of Fifty-one, which had originally called for the Congress to be held, and was replaced by the Committee of One Hundred.

John Dickinson: John Dickinson (November 8, 1732 – February 14, 1808), a Founding Father of the United States, was a solicitor and politician from Philadelphia, Pennsylvania and Wilmington, Delaware known as the "Penman of the Revolution" for his twelve "Letters from a Farmer in Pennsylvania", published individually in 1767 and 1768.  As a member of the First Continental Congress, where he was a signee to the Continental Association, Dickinson drafted most of the 1774 Petition to the King, and then as a member of the Second Continental Congress wrote the 1775 Olive Branch Petition, two attempts to negotiate with King George III of Great Britain.  When these failed, he reworked Thomas Jefferson's language and wrote the final draft of the 1775 Declaration of the Causes and Necessity of Taking Up Arms.  When Congress then decided to seek independence, Dickinson served on the committee that wrote the Model Treaty, and then wrote the first draft of the 1776–1777 Articles of Confederation and Perpetual Union.

James Duane: James Duane (February 6, 1733 – February 1, 1797) was an American lawyer, jurist, and Revolutionary leader from New York.  He served as a delegate to the Continental Congress, a New York state senator, the 44th mayor of New York City, the first post-colonial American mayor, and a U.S. District Judge.  Duane was a signer of both the Continental Association and the Articles of Confederation.

Edward Biddle: Edward Biddle (1738–1779) was an American soldier, lawyer, and statesman from Pennsylvania.  He was a delegate to the Continental Congress in 1774 and 1775 and a signatory to the Continental Association.

Virginia Association: The Virginia Association was a series of non-importation agreements adopted by Virginians in 1769 as a way of speeding economic recovery and opposing the Townshend Acts.  Drafted by George Mason and passed by the Virginia House of Burgesses in May 1769, the Virginia Association was a way for Virginians to stand united against continued British taxation and trade control.  The Virginia Association served as the framework and precursor to the larger more powerful Continental Association.

Supporting paragraphs: Continental Association First Continental Congress
Answer: Philadelphia