subparsers = main_parser.add_subparsers(help='Commands')
parser = subparsers.add_parser('authors', help='Search authors')
parser.add_argument('-s', '--surname', help='search by surname')
parser.add_argument('-n', '--name', help='search by name')
parser.add_argument('-m', '--misc-name', help='search by misc. name')
subparsers = main_parser.add_subparsers(help='Commands')
parser = subparsers.add_parser('authors', help='Search authors')
parser.add_argument('-s', '--surname', help='search by surname')
parser.add_argument('-n', '--name', help='search by name')
parser.add_argument('-m', '--misc-name', help='search by misc. name')