A number of people have said that Photos has grouped their photos by people, with Google saying that the feature can recognise faces over time ... I don't have

A number of people have said that Photos has grouped their photos by people, with Google saying that the feature can recognise faces over time ... I don't have that, and I want to try it. Anyone know a way of forcing it to show me People? I only have Places and Things. I like what Google's done! I can search for 'baby' and get all the photos with babies (few false positives here and there). Hopefully in the near future they'll add feedback options so we can point out errors in classification.