Create a detailed prompt for generating a hand-drawn style illustration of Istanbul's skyline, incorporating iconic landmarks such as the Hagia Sophia, Galata Tower, and the Bosphorus with specific color palettes and artistic techniques.
{
"subject": {
"description": "一幅手绘的、儿童风格的伊斯坦布尔天际线插画。场景包括圣索菲亚大教堂和另一座带有蓝色圆顶和橙色赤陶墙的清真寺、加拉塔塔，以及一条有三艘小船的蓝色河流（博斯普鲁斯海峡）。最上方，用大号、多色的手写块状字符写着‘İSTAN BUL’字样。",
"count": 1,
"position_in_frame": "居中",
"orientation": "正面",
"expression_or_state": "静止...