db.Artworks.aggregate( [
    { $match : { "Title" : "Hanselmann House, Fort Wayne, Indiana"}},
    { $lookup : { from : "Artists", localField : "Artist", foreignField : "_id", as : "ArtistInfo"} },
    { $project : { "Title":1, ArtistNames : "$ArtistInfo.DisplayName", "Medium" : 1, "CreditLine":1, "Classification":1, "Department":1, _id:0}}
]).pretty()