Instructions: This task is about writing a correct answer for the reading comprehension task. Based on the information provided in a given passage, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.
Input: Passage: Unaspirated or tenuis consonants are occasionally marked with the modifier letter for unaspiration , a superscript equal sign: t. Usually, however, unaspirated consonants are left unmarked: t. Question: Most often, unaspirated consonants are what?
Output:
left unmarked