《太平广记·卷四百一十·草木五》
有一天，有一头牛离群，忽然间就不知跑到哪儿去了，到了晚上牛才回来。
有一牛离群，忽失所在，至暮方归。形色鸣吼异常，牛主异之。
One day, one of the cattle lost their group, and suddenly I didn't know where they went. The cattle didn't come back until evening.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 有一牛离群，忽失所在，至暮方归。形色鸣吼异常，牛主异之。 [/INST] One day, one of the cattle lost their group, and suddenly I didn't know where they went. The cattle didn't come back until evening.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 有一牛离群，忽失所在，至暮方归。形色鸣吼异常，牛主异之。
user
One day, one of the cattle lost their group, and suddenly I didn't know where they went. The cattle didn't come back until evening.
assistant