load_col: 
    inter: ['user_id', 'item_id', 'rating', 'timestamp']
    kg: ['head_id', 'relation_id', 'tail_id']
    link: ['item_id', 'entity_id']

# Data preprocessing for knowledge graph triples
kg_reverse_r: False                     # (bool) Whether to reverse relations of triples for bidirectional edges.
entity_kg_num_interval: "[0,inf)"       # (str) Entity interval for filtering kg.
relation_kg_num_interval: "[0,inf)"     # (str) Relation interval for filtering kg.