Wie\tse\tboek\tis\tdit ?\tDi=s\tmy-ne/jou-ne/sy-ne/ha-re .
who\tPOSS\tbook\tis\tit\t3SG=s\t1SG.POSS/2SG.POSS/3SG.M.POSS/3SG.F.POSS
Whose book is this? It's mine, yours, his, hers vs. ours, yours, theirs, yours (polite).