In Alexander v. Buckeye Pipe Line Co., 53 Ohio St. 2d 241, 374 N.E.2d 146, 151 (Ohio, 1978), right-of-way agreements executed in 1911 and 1947 allowed for transport of "oil" and "gas," and the property owners argued that this meant only crude oil and natural gas could be transported through the pipelines, not fuel oil, gas oil, propane and butane, or other gasoline products. "Because there is no language contained in the 1947 agreement which specifies or limits which products or substances may be transported, it follows that appellee is not limited in the kinds of products it may transport through the pipe line installed under this agreement." Id. It also found the terms "oil" and "gas" to be unambiguous and so would not allow extrinsic evidence to be introduced to determine their meaning. Id.