# data[].attributes.body
Given 5-way B-tree created by these data (last exercise):

3, 7, 9, 23, 45, 1, 5, 14, 25, 24, 13, 11, 8, 19, 4, 31, 35, 56

Add these further keys: 2, 6,12

Delete these keys: 4, 5, 7, 3, 14

# data[].attributes.headline
GROUP1: PEI WEN, ANGELA, GAO CHAN, REN XUE

# data[].attributes.subject
GROUP1: PEI WEN, ANGELA, GAO CHAN, REN XUE

# data[].attributes.headline
GROUP 2: BRONSON, SHARVIN, ZHAO HUAN, MUSTAFA

# data[].attributes.subject
GROUP 2: BRONSON, SHARVIN, ZHAO HUAN, MUSTAFA