def entry_has_keyword(keyword):
	"""Return a function that will filter (i.e. return true) if the provided entry has the given keyword in its title."""
	def filter_function(entry):
		if entry is None:
			return False
		title = entry.get('title')
		if title is None:
			return False
		if entry.get('issued') is None:
			return False
		return title.find(keyword) > -1
	return filter_function