rel_query

rel_query = '\nMATCH (
  n)-[r]->(m)\nUNWIND labels(n) as src_label\nUNWIND labels(m) as dst_label\nUNWIND type(r
) as rel_type\nRETURN DISTINCT {start: src_label, type: rel_type, end: dst_label} AS output\n'