Definition: In this task you are given a Chinese paragraph related to criminal cases, your job is to give an answer to what the criminal's name is.
Input: 沈丘县人民检察院指控，2017年4月27日7时许，沈丘县公安局民警在沈丘县冯营乡杨某行政村杨某王4某住宅院子里查获罂粟803株，经侦查系被告人王4某所种植。经国家林业局森林公安司法鉴定中心物证鉴定，被告人王4某种植的植物为毒品原植物罂粟。上述指控事实，公诉机关提供了书证、证人证言、被告人供述、鉴定意见、现场勘验笔录等证据予以证实。公诉机关认为应当以××罪追究被告人王4某的刑事责任。请求依法判处。
Output:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
王4某