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350px | thumb | right | Dock protesters camped outside Cheung Kong Center HQ of Hutchison Whampoa on day 28 ; vilification of Li Ka-ShingThe 2013 Hong Kong dock strike was a 40-day labour strike at the Kwai Tsing Container Terminal It was called by the Union of Hong Kong Dockers ( UHKD ) an affiliate of the Hong Kong Confederation of Trade Unions ( HKCTU ) on 28 March 2013 against contracting companies to whom workforce management had been out-sourced by the  Hongkong International Terminals Ltd.  ( HIT ) subsidiary of Hutchison Port Holdings Trust ( HPHT ) which is in turn owned by  Hutchison Whampoa  Ltd ( HWL ) flagship company of Li Ka-shing Hong Kong's richest man .
 subsidiaries: Hongkong International Terminals Ltd., Hutchison Whampoa
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: cities of residence, top members employees, members, alternate names, origin, state or provinces of residence, title of person, spouse, city of headquarters, NA, founded by, state or province of headquarters, employee of, countries of residence, country of birth, founded, subsidiaries, country of headquarters 
Text: {0} 
 Entity Pairs:  Hongkong International Terminals Ltd., Hutchison Whampoa 
Answer:
 subsidiaries: Hongkong International Terminals Ltd., Hutchison Whampoa