def get_all_direct_statements(self):
        """Get all directlyIncreases/Decreases BEL statements.

        This method stores the results of the query in self.all_direct_stmts
        as a list of strings. The SPARQL query used to find direct BEL
        statements searches for all statements whose predicate is either
        DirectyIncreases or DirectlyDecreases.
        """
        logger.info("Getting all direct statements...\n")
        q_stmts = prefixes + """
            SELECT ?stmt
            WHERE {
                ?stmt a belvoc:Statement .
                {
                  { ?stmt belvoc:hasRelationship belvoc:DirectlyIncreases . }
                  UNION
                  { ?stmt belvoc:hasRelationship belvoc:DirectlyDecreases . }
                }
            }
        """

        res_stmts = self.g.query(q_stmts)
        self.all_direct_stmts = [strip_statement(stmt[0]) for stmt in res_stmts]
Get all directlyIncreases/Decreases BEL statements.

        This method stores the results of the query in self.all_direct_stmts
        as a list of strings. The SPARQL query used to find direct BEL
        statements searches for all statements whose predicate is either
        DirectyIncreases or DirectlyDecreases.