Los Angeles-based venture investor Trousdale Ventures announced this morning that it has made an investment in Preamble, a startup offering up "ethical artificial intelligence" moderation to social networks. Size of the seed funding round was not announced. Trousdale said that the seed funding will go to further develop Preamble's platform, as well as for collaboration with non-profits. The company said that Preamble's software is used to help prevent amplification of harmful content. Trousdale Ventures is led by Phillip Sarofim.