question: In which city is the headquarters of the parent company of WesCEF ?
answer: Perth
context: Title: Wesfarmers
  Passage: Wesfarmers Limited is an Australian conglomerate, headquartered in Perth, Western Australia, with interests predominantly in Australian and New Zealand retail, chemicals, fertilisers, coal mining and industrial and safety products.  With AU$65.98 billion in the 2016 financial year, it is the largest Australian company by revenue, overtaking Woolworths and BHP Billiton.  Wesfarmers is the largest private employer in Australia, with approximately 205,000 employees.
  Title: CSBP
  Passage: CSBP Limited is an Australian fertiliser and chemical company based in Kwinana, Western Australia.  It is a subsidiary of WesCEF, which in turn is part of the industrials division of the Wesfarmers conglomerate.
  Title: Charlie the Tuna
  Passage: Charlie the Tuna is the cartoon mascot and spokes-tuna for the StarKist brand.  He was created in 1961 by Tom Rogers of the Leo Burnett Agency after StarKist hired Leo Burnett in 1958.  StarKist Tuna is the name of a brand of tuna currently owned by Dongwon Industries, a South Korea-based conglomerate.  StarKist itself is based in Pittsburgh, the home of its former parent company, H. J. Heinz Company, sharing its headquarters on the site of Three Rivers Stadium with another former parent company, Del Monte Foods' Pittsburgh headquarters.
  Title: Pivotal Games
  Passage: Pivotal Games Limited was a British video game developer based in Corston, England, founded in March 2000 by fifteen ex-Pumpkin Studios employees, after it was shut down by its parent company, Eidos Interactive.  Led by Jim Bambra, Nick Cook and Alex McLean, of which Bambra and Cook had previously founded Pumpkin Studios in August 1996, the studio was formed under the Kaboom Studios umbrella, in order to establish a publishing relationship to Sales Curve Interactive (SCi, later renamed SCi Games).  Between 2002 and 2008, Pivotal Games developed all installments in the "Conflict" series, as well as "The Great Escape", based on the film of the same name.  In September 2003, after financial struggles of parent company Kaboom Studios, who had at that point had already closed down sister studios Attention to Detail and Silicon Dreams Studio, SCi showed interest in acquiring the company.  Kaboom Studios went into receivership on 9 September 2003, with all remaining assets, including still-active Pivotal Games, being transferred to Ernst & Young for sale.  On 29 September 2003, SCi acquired Pivotal Games from Ernst & Young for a total of GB£ .  In May 2005, SCi Games finalised its acquisition and merger with Eidos plc, the parent of Eidos Interactive, which would become in charge of SCi Games' subsidiaries.  In March 2008, SCi Games closed down fourteen operating projects to counter a GB£ net loss from the preceding fiscal year, leading to rumors that Pivotal Games was also to be closed.  On 14 July 2008, it was officially announced that the studio was to shut its doors, and 99 staff had already been made redundant, leaving only a team of 10–12 specialist personnel.  Pivotal Games was closed on 13 August 2008.
  Title: Parent company guarantee
  Passage: A parent company guarantee (PCG) is a guarantee by a parent company of a contractor’s performance under its contract with its client, where the contractor is a subsidiary of the parent company.
citations: CSBP Wesfarmers