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.

In early March, when merger talks were under way between Towers Watson TW, -0.76% and insurance broker Willis Group Holdings PLC WSH, -1.82% , Haley exercised 106,933 stock options and sold the underlying shares for a $9.7 million profit, according to regulatory filings.

Answer: industry: Willis Group, insurance broker