In a dance studio , dancers in Scottish kilts rehearse before an instructor .
It is probably not the case that the dancers , wearing costumes , are dancing in the room in front of a person .
It is probably not the case that the dancers , wearing costumes , are dancing in the room in front of a person .
It is probable that the dancers , wearing costumes , are dancing in the room in front of a person .
The dancers , wearing costumes , are dancing in the room in front of a person .