public String getKey() {
        return this.key;
    }
<p>
The QuestionID from the HIT that is used to identify which question requires Mechanical Turk to score as part of
the ScoreMyKnownAnswers/2011-09-01 Review Policy.
</p>

@return The QuestionID from the HIT that is used to identify which question requires Mechanical Turk to score as
        part of the ScoreMyKnownAnswers/2011-09-01 Review Policy.
aws-java-sdk-mechanicalturkrequester/src/main/java/com/amazonaws/services/mturk/model/ParameterMapEntry.java