def clean_row_author_info(row_author_info):
	"""Returns a string of author info stripped of parentheses or numericals"""
	clean_row_author_info = ""
	for i in range(len(row_author_info)):
		undesirable_characters = "()-"
		if row_author_info[i].isnumeric() or row_author_info[i] in undesirable_characters:
			continue
		clean_row_author_info += row_author_info[i]
	return clean_row_author_info