nà / wèi / xíng / wéi / yì / shù / jiā / zhèng / zài / guǎng / chǎng / shàng / jìn / xíng / xiàn / chǎng / biǎo / yǎn

那位行为艺术家正在广场上进行现场表演。

That performance artist is giving a live performance in the square.