Which structure is cited as potentially being larger than Quipu, although its status as a single entity is disputed?

Answer

Hercules–Corona Borealis Great Wall

The Hercules–Corona Borealis Great Wall is often cited as potentially being much larger, around 10 billion light-years across, but its existence as a single, interconnected entity is disputed.

Which structure is cited as potentially being larger than Quipu, although its status as a single entity is disputed?
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