 In this paper , we consider the problem with additionalfairness constraints , which takes into account the group membership of data items and limits the  number of items selected from each group to a given number.
<clarity>  In this paper , we consider the problem with additionalfairness constraints , which takes into account the group membership of data items and limits the  number of items selected from each group to a given number.
 In this paper , we consider the problem with additionalfairness constraints , which takes into account the group membership of data items and limits the number of items from each group to a given number.