Construct query to get the movies triple of interest from IMDb dataset

Costruct a subset of IMDb where only the movie assigned to only one genre is selected. Furthermore, given the high-class imbalance present in the dataset for what concerns the different genres, only the movies belonging to genres for which at least 400 data points are observed are selected. It is to be mentioned that both the information about movies and about entities related to those movies are to be selected.