question: What part of the palace has been open to the public every August and September and other select dates since 1993 ?
answer: The palace 's state rooms
turker_answer: The palace 's state rooms have been open to the public every August and September and other select dates since 1993 .
rule-based: The palace 's state rooms has been open to the public every August and September and other select dates since 1993 .