Utilize the input text as a context reference, choose the right relationship between United Rentals and Equipment Rental 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.

Company Ticker Industry Price decline - Thursday Price decline from 12-month high Caterpillar Inc. CAT, -5.74% Trucks/ Construction/ Farm Machinery -7.0% -38.7% United Rentals Inc. URI, -3.70% Equipment Rental -4.6% -49.3% Parker-Hannifin Corp. PH, -3.52% Industrial Machinery -4.6% -27.7% Deere & Co. DE, -3.35% Trucks/ Construction/ Farm Machinery -4.0% -23.3% Tenet Healthcare Corp. THC, -4.30% Hospital/ Nursing Management -3.4% -29.4% FMC Corp. FMC, -3.55% Agricultural Chemicals -3.4% -45.6% Vulcan Materials Co. VMC, -3.85% Construction Materials -3.3% -8.5% Delphi Automotive PLC DLPH, -2.97% Auto Parts: OEM -3.2% -19.6% CF Industries Holdings Inc. CF, -2.58% Agricultural Chemicals -3.2% -32.9% Lam Research Corp. LRCX, -1.73% Electronic Production Equipment -3.1% -26.9% Source: FactSet Caterpillar lowered its sales outlook for 2015 to $48 billion from $49 billion and said it expected sales to decline 5% during 2016.

Answer: industry