input question: Determine the topic of the passage. "Shoulder impingement syndrome, also called painful arc syndrome, supraspinatus syndrome, swimmer's shoulder, and thrower's shoulder, is a clinical syndrome which occurs when the tendons of the rotator cuff muscles become irritated and inflamed as they pass through the subacromial space, the passage beneath the acromion ." Topic:???
output answer: Impingement syndrome

Determine the topic of the passage. "Steam is a digital distribution , digital rights management , multiplayer and communications platform developed by Valve Corporation ." Topic:
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Answer: Steam (software)

Q: Determine the topic of the passage. "9 – 12 February (Vietnam)" Topic:
A: Chinese New Year

Question: Determine the topic of the passage. "Single Malt Scotch is single malt whisky made in Scotland using a pot still distillation process at a single distillery , with malted barley as the only grain ingredient." Topic:
Answer: Single malt Scotch

[Q]: Determine the topic of the passage. ""Sun City" is a 1985 protest song written by Steven Van Zandt , produced by Van Zandt and Arthur Baker and recorded by Artists United Against Apartheid to convey opposition to the South African policy of apartheid ." Topic:
****
[A]: Sun City (song)

Problem: Given the question: Determine the topic of the passage. "Approximately 72% of the planet's surface (~3.6x108 km2) is covered by saline water that is customarily divided into several principal oceans and smaller seas, with the ocean covering approximately 71% of the Earth's surface." Topic:
++++++++++++++++++++++++++++++++
The answer is:

Ocean