What is the relationship between 'Balfour Beatty' and 'construction' in the context of the input sentence.
Options: publisher, industry, employer, subsidiary

Balfour Beatty (Other OTC: BAFBF - news ) has issued another profit warning, with pre-tax profit likely to be lower by between £120m to £150m due to problems discovered in various parts of the infrastructure construction group as part of a continuing business review.
industry