def create_constraint_clause(label: str, node: str = 'node') -> str:
	"""
	Returns the *part* of a statement that creates a constraint.

	Parameters
	----------
	label : str
		The label (node type) on which to create the index
	node : str, optional
		Name of the node when referred in another statement

	Returns
	-------
	out: str
		Neo4j statement

	"""

	return f"CREATE CONSTRAINT ON ({node}:`{label}`)"