3185
MediaTek was originally a research and development unit of  United Microelectronics Corporation  or UMC  Taiwan  's oldest chipmaker tasked with designing chips for home entertainment products .
 country of headquarters: United Microelectronics Corporation, Taiwan
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:  United Microelectronics Corporation, Taiwan 
Answer:
 country of headquarters: United Microelectronics Corporation, Taiwan