If there are no defeats within the Schwartz set then the winner is chosen from the options in the Schwartz set If there is only one such option it is the winner If there are multiple options the elector with the casting vote chooses which of those options wins

Please fix the punctuation.
If there are no defeats within the Schwartz set, then the winner is chosen from the options in the Schwartz set. If there is only one such option, it is the winner. If there are multiple options, the elector with the casting vote chooses which of those options wins.