Freebase cocaine paste preparations can be smoked. Nicotine salts are also less acidic than freebase nicotine, making them easier to inhale. The slow evaporation of freebase propylhexedrine allows it to be administered via inhalation. Freebase, though not billed as a wiki engine, is a web database with semantic-wiki-like properties. Freebase propylhexedrine is a volatile, oily liquid at room temperature. However, Freebase differed from the wiki model in many ways. It consisted of Lofty305, Ruben Slikk, Freebase, and Poshtronaut. Google's Knowledge Graph was powered in part by Freebase. In July 2010, Google purchased Metaweb, the company behind Freebase. Google shut down Freebase in 2016, transferring all its data to Wikidata. The data are reused by other organizations, such as Freebase, under the creative commons license. The Knowledge Graph was powered in part by Freebase. Future plans may connect Cyc to both DBpedia and Freebase.