让我们来分解一下：<start_function_call — 函数调用开始，call: — 前缀，change_background_color — 函数名，{color:<escapered<escape} — 带转义标记的参数，<end_function_call — 函数调用结束。
The James Webb Space Telescope has snapped new pictures of a cosmic cloud of gas and dust blown off by a dying star, whose fate is still unknown to scientists.
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