Given the task definition and input, reply with output. In this task, you're given a context passage, followed by a question that needs to be answered. Based on the paragraph, you must write unambiguous answers to the questions and your answer must refer to a specific phrase from the paragraph. If multiple answers seem to exist, write the answer that is the most plausible.

He raised me on his own because my mom wasn't the best role - model and was more interested in finishing high school than raising me . I mean , my dad wasn't a saint , but he did what he did to give me everything he never had . For the first 13 years of my life I lived with my dad in San Francisco's Oakdale projects , 1100 block to be exact . My dad was more then a dad to me , he was more like my hero .
Question: What may have caused your dad to raise you on his own ?
My mother wasn't present in my life .