Utilize the input text as a context reference, choose the right relationship between water treatment and water 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.

As opposed to operating as a systems provider, LiqTech and our partners saw an opportunity to capture increasing share of economics by working together to build out and operate large water treatment systems and work with large oil and gas producers to create long-term water supply agreements.

Answer: product_or_material_produced