Analyze the relationship between 'Halliburton' and 'HOUSTON' within the context of the input sentence.
Options: employer, industry, chairperson, headquarters location

HOUSTON (Reuters) - The strong valuation of engineering and construction firm KBR Inc. ( KBR.N ) will likely prompt directors of parent company Halliburton Co. ( HAL.N ) to vote to give KBR shareholders a chance to exchange stock in Halliburton for their newly listed business, analysts said.
headquarters location