Question: What is the second busiest airport in the metro area Roark returns to?

full_context: Document 1: Ryan Atwood: In a flashforward, Ryan attends UC Berkeley, where Sandy is now a law professor. At Seth and Summer's wedding, he is best man and shares a smile with Taylor, the maid of honor (their relationship status is left ambiguous). Ryan achieves his dream of becoming an architect. As he walks away from a construction site, he notices a teenager down on his luck, seemingly in the same situation Ryan was when he was kicked out of his home. As he offers the youth help, Ryan's story comes full circle.
Document 2: Anton Rupert: After dropping out of medical school due to a lack of funds, Rupert earned a chemistry degree at the University of Pretoria, where he also lectured for a short while. Subsequently, he started a dry-cleaning business.
Document 3: London: London is a major international air transport hub with the busiest city airspace in the world. Eight airports use the word London in their name, but most traffic passes through six of these. London Heathrow Airport, in Hillingdon, West London, is the busiest airport in the world for international traffic, and is the major hub of the nation's flag carrier, British Airways. In March 2008 its fifth terminal was opened. There were plans for a third runway and a sixth terminal; however, these were cancelled by the Coalition Government on 12 May 2010.
Document 4: The Circle (Eggers novel): The book follows the story of Mae Holland, a recent college graduate who lands a job at The Circle, a powerful technology company run by the ``Three Wise Men. ''Mae owes her job largely to her best friend and college roommate, Annie, one of the forty most influential people in the company. Mae starts out in Customer Experience (CE), the firm's customer service department, but quickly climbs the company ladder. From the beginning, Mae is impressed by amenities at The Circle, including access to top - notch technology, dorm - like housing, gyms, recreation activities and parties. Mae's very first day at The Circle ends with a party where she encounters Francis, who remains a love interest throughout the rest of the novel. Later, Mae encounters and quickly becomes romantically involved with a mysterious colleague named Kalden, even though she is unable to verify his status at the company, or even obtain his last name.
Document 5: The Fountainhead: After Cameron retires, Keating hires Roark, whom Francon soon fires for refusing to design a building in the classical style. Roark works briefly at another firm, then opens his own office but has trouble finding clients and closes it down. He gets a job in a granite quarry owned by Francon. There he meets Francon's daughter Dominique, a columnist for The New York Banner, while she is staying at her family's estate nearby. They are immediately attracted to each other, leading to a rough sexual encounter that Dominique later calls a rape. Shortly after, Roark is notified that a client is ready to start a new building, and he returns to New York. Dominique also returns to New York and learns Roark is an architect. She attacks his work in public, but visits him for secret sexual encounters.
Document 6: New Delhi: Indira Gandhi International Airport, situated to the southwest of Delhi, is the main gateway for the city's domestic and international civilian air traffic. In 2012-13, the airport was used by more than 35 million passengers, making it one of the busiest airports in South Asia. Terminal 3, which cost ₹96.8 billion (US$1.4 billion) to construct between 2007 and 2010, handles an additional 37 million passengers annually.
Document 7: Miami: Miami International Airport serves as the primary international airport of the Greater Miami Area. One of the busiest international airports in the world, Miami International Airport caters to over 35 million passengers a year. The airport is a major hub and the single largest international gateway for American Airlines. Miami International is the busiest airport in Florida, and is the United States' second-largest international port of entry for foreign air passengers behind New York's John F. Kennedy International Airport, and is the seventh-largest such gateway in the world. The airport's extensive international route network includes non-stop flights to over seventy international cities in North and South America, Europe, Asia, and the Middle East.
Document 8: New York City: New York's airspace is the busiest in the United States and one of the world's busiest air transportation corridors. The three busiest airports in the New York metropolitan area include John F. Kennedy International Airport, Newark Liberty International Airport, and LaGuardia Airport; 109 million travelers used these three airports in 2012, and the city's airspace is the busiest in the nation. JFK and Newark Liberty were the busiest and fourth busiest U.S. gateways for international air passengers, respectively, in 2012; as of 2011, JFK was the busiest airport for international passengers in North America. Plans have advanced to expand passenger volume at a fourth airport, Stewart International Airport near Newburgh, New York, by the Port Authority of New York and New Jersey. Plans were announced in July 2015 to entirely rebuild LaGuardia Airport in a multibillion-dollar project to replace its aging facilities.
Document 9: Betty Draper: During Episode 3, Betty and Don attend a country club party hosted by Roger Sterling and his new wife, Jane Siegel Sterling, where Betty meets Henry Francis, who is later revealed to be an advisor to then - New York governor Nelson A. Rockefeller. Henry is infatuated with Betty, and though she seems reluctant to return his feelings at first, as the season progresses, their affair intensifies. Betty eventually ends it, feeling guilty.
Document 10: Paris: Paris is a major international air transport hub with the 4th busiest airport system in the world. The city is served by three commercial international airports: Paris-Charles de Gaulle, Paris-Orly and Beauvais-Tillé. Together these three airports recorded traffic of 96.5 million passengers in 2014. There is also one general aviation airport, Paris-Le Bourget, historically the oldest Parisian airport and closest to the city centre, which is now used only for private business flights and air shows.
Document 11: Bill Kincaid: Robbin and Kincaid worked for Apple in the 1990s as system software engineers on their operating system project Copland; the project was later abandoned. Both left Apple, where Robbin created Conflict Catcher and Kincaid worked at a startup.
Document 12: Pretty Woman: Edward takes Vivian to a polo match in hopes of networking for his business deal. His attorney, Phillip, suspects Vivian is a corporate spy, and Edward tells him how they truly met. Phillip later approaches Vivian, suggesting they do business once her work with Edward is finished. Insulted, and furious that Edward has revealed their secret, Vivian wants to end the arrangement. Edward apologizes, and admits to feeling jealous of a business associate to whom Vivian paid attention at the match. Vivian's straightforward personality is rubbing off on Edward, and he finds himself acting in unaccustomed ways. Clearly growing involved, Edward takes Vivian in his private jet to see La Traviata in San Francisco. Vivian is moved to tears by the story of the prostitute who falls in love with a rich man. Vivian breaks her ``no kissing on the mouth ''rule (which her friend Kit taught her) and they have sex; in the aftermath, Vivian tells Edward she loves him, but he does not respond. Edward offers to put her up in an apartment so she can be off the streets. Hurt, she refuses, says this is not the`` fairy tale'' she dreamed of as a child, in which a knight on a white horse rescues her.
Document 13: New York City: New York City's commuter rail network is the largest in North America. The rail network, connecting New York City to its suburbs, consists of the Long Island Rail Road, Metro-North Railroad, and New Jersey Transit. The combined systems converge at Grand Central Terminal and Pennsylvania Station and contain more than 250 stations and 20 rail lines. In Queens, the elevated AirTrain people mover system connects JFK International Airport to the New York City Subway and the Long Island Rail Road; a separate AirTrain system is planned alongside the Grand Central Parkway to connect LaGuardia Airport to these transit systems. For intercity rail, New York City is served by Amtrak, whose busiest station by a significant margin is Pennsylvania Station on the West Side of Manhattan, from which Amtrak provides connections to Boston, Philadelphia, and Washington, D.C. along the Northeast Corridor, as well as long-distance train service to other North American cities.
Document 14: Southern California: Southern California is home to Los Angeles International Airport, the second-busiest airport in the United States by passenger volume (see World's busiest airports by passenger traffic) and the third by international passenger volume (see Busiest airports in the United States by international passenger traffic); San Diego International Airport the busiest single runway airport in the world; Van Nuys Airport, the world's busiest general aviation airport; major commercial airports at Orange County, Bakersfield, Ontario, Burbank and Long Beach; and numerous smaller commercial and general aviation airports.
Document 15: List of busiest airports in the United Kingdom: The United Kingdom, an island country, is home to many of Europe's largest and busiest airports. London - Heathrow, which handles over 75 million international passengers annually, is the largest airport in the UK. London serves as the largest aviation hub in the world by passenger traffic, with six international airports, handling over 163 million passengers in 2016, more than any other city. London's second - busiest airport, London - Gatwick, was until 2016 the world's busiest single - runway airport. Manchester Airport is the United Kingdom's third - busiest airport. London - Stansted and London - Luton are the fourth - and fifth - busiest airports, respectively.
ground_truth: Newark Liberty International Airport
sub_queries: What city does Roark return to? Answer: New York
What is the second busiest airport in the New York metro area? Answer: Newark Liberty International Airport