TASK DEFINITION: In this task, you're given a sentence and your task is to generate a simplified sentence that focuses on lexical paraphrasing from the original sentence given in the input.
PROBLEM: south india is the area encompassing india 's states of andhra pradesh , karnataka , kerala and tamil nadu as well as the union territories of lakshadweep and pondicherry , occupying 19.31 % of area.

SOLUTION: 19.31 % area of india consists of south indian states of andhra pradesh , karnataka , kerala and tamil nadu and union territories of lakshadweep and pondicherry.

PROBLEM: the battle began a seven-year war which established the rhine as the boundary of the roman empire for the next four hundred years , until the decline of the roman influence in the west.

SOLUTION: the battle continued for seven years and as a result the rhine became the boundary of the roman empire for the next four hundred years . it persisted so until the downfall of the roman control in the west.

PROBLEM: apparently after her death , shah jahan went into secluded mourning for a year.

SOLUTION:
shah jahan went into a secluded mourning for a year after her death.