Utilize the input text as a context reference, choose the right relationship between Thomson Reuters and Toronto from the options. 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 particular, Thomson Reuters share price purchases will be dictated for by private agreements will be at a discount to the prevailing market price on the Toronto Stock Exchange (TSX) at the time of purchase.

Answer: headquarters_location