import re

def extract_sections(content_text):
    result = {"叙事": "", "事对": "", "诗文": ""}

    rest_after_narrative = content_text

    shìduì_start = rest_after_narrative.find("事對")
    if shìduì_start == -1:
        shìduì_start = rest_after_narrative.find("事对")

    genre_pattern = r"〉(賦|詩|讚|表|碑|頌|銘|檄|文|啓|書|歌|曲|引|記|箴|七|連珠|弔|祭文|詔|令|誄|序|論|賛|讃|啟|辭|辞|操|對|对|銘|論)"

    if shìduì_start != -1:
        result["叙事"] = rest_after_narrative[:shìduì_start]
        rest_after_shiduì = rest_after_narrative[shìduì_start + 2 :]

        shiwen_match = re.search(genre_pattern, rest_after_shiduì)

        if shiwen_match:
            split_idx = shiwen_match.start() + 1
            result["事对"] = rest_after_shiduì[:split_idx]
            result["诗文"] = rest_after_shiduì[split_idx:]
        else:
            result["事对"] = rest_after_shiduì
    else:
        shiwen_match = re.search(genre_pattern, rest_after_narrative)
        if shiwen_match:
            split_idx = shiwen_match.start() + 1
            result["叙事"] = rest_after_narrative[:split_idx]
            result["诗文"] = rest_after_narrative[split_idx:]
        else:
            result["叙事"] = rest_after_narrative

    for k in result:
        result[k] = result[k].replace("〈", "（").replace("〉", "）")

    return result

import json
print(extract_sections("這里是叙事事對這裡是事對〉詩這里是詩文"))