Sentence:  Dr. Isaacs was so pleased with the quality of her biographical study of Sara Sullam that he considered submitting it to the Century Magazine or Harper 's but he decided that its Jewish <WSD>subject</WSD> probably would not interest them and published it in The Messenger , `` so our readers will be benefited instead '' . 
Meaning of the word marked with <WSD> tags:  some situation or event that is thought about