For someone who didn't exactly excel in chemistry, this was rough:

"Automotive industry" to "Pi bond" Time: 145.773 Seconds

Number of links visited: 13

The path you took: [ "Automotive industry", "Industry (economics)", "Product (business)", "Raw material", "Foundry", "Hydrogen gas porosity", "Hydrogen", "Diatomic molecule", "Molecule", "Chemical bond", "Bond length", "Molecular geometry", "Covalent bond", "Pi bond" ] 145.77300000000002

This (almost) exact scenario played out in Marsh v. Alabama (https://en.wikipedia.org/wiki/Marsh_v._Alabama). If the town is, for all intents and purposes, acting like a traditional town, and with the public having access to it, first amendment rights hold.

Also, worth reading up on Manhattan Community Access Corp. v. Halleck (https://en.wikipedia.org/wiki/Manhattan_Community_Access_Cor...)