def get_all_indirect_statements(self):
        """Get all indirect increases/decreases BEL statements.

        This method stores the results of the query in self.all_indirect_stmts
        as a list of strings. The SPARQL query used to find indirect BEL
        statements searches for all statements whose predicate is either
        Increases or Decreases.
        """
        q_stmts = prefixes + """
            SELECT ?stmt
            WHERE {
                ?stmt a belvoc:Statement .
                {
                  { ?stmt belvoc:hasRelationship belvoc:Increases . }
                  UNION
                  { ?stmt belvoc:hasRelationship belvoc:Decreases . }
                }
            }
        """

        res_stmts = self.g.query(q_stmts)
        self.all_indirect_stmts = [strip_statement(stmt[0]) for stmt in res_stmts]
Get all indirect increases/decreases BEL statements.

        This method stores the results of the query in self.all_indirect_stmts
        as a list of strings. The SPARQL query used to find indirect BEL
        statements searches for all statements whose predicate is either
        Increases or Decreases.