Teacher:In this task you are given a Chinese paragraph related to a criminal case, your job is to give an answer of what the criminal charge is. Take note a) if there are multiple charges only one needs to be outputted b) the criminal charge should be in Chinese. 
Teacher: Now, understand the problem? Solve this instance: 公诉机关指控，2015年2月份以来，被告人杨某通过网络购买淫秽视频，存储于其注册的个人115云盘中，此后在QQ群发布淫秽广告，向他人推销、贩卖淫秽视频，并从中牟利。其中2015年6月16日，被告人杨某向毛某销售淫秽视频230部，获利50元。
Student:
[制造、贩卖、传播]淫秽物品