Or, by "id"? I looked, but I wasn't able to figure out, for example, how I'd get pg's top-level comment here from the id "2619846". I was able to find it with this search, but it requires a second-part to the "_id" that I don't know where to find: http://api.thriftdb.com/api.hnsearch.com/items/_search?q=... (Trying to filter for "id" instead of "_id" throws an error, for some reason.)