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gathering
「群」 has another reading with different meanings.
羊の群れが丘の上で草を食んでいた。
A flock of sheep was grazing on the hill.
魚の群が海面近くを泳いでいるのが見えた。
I could see a school of fish swimming near the surface.
群を抜いて優秀な成績を収めていた。
He achieved outstanding results, standing out from the crowd.