Given phrases that describe the relationship between two words/phrases as options, extract the word/phrase pair and the corresponding lexical relationship between them from the input text. The output format should be "relation1: word1, word2; relation2: word3, word4". Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.
Text: As analysts including Mr Mott and Mr Martin probed Westpac chief executive Brian Hartzer on Monday at the briefing over the accounting treatment, Mr Hartzer assured them there is nothing tricky about the policy.
user
employer: Brian Hartzer, Westpac
assistant