Suppose The Smith family consists of Mr. and Mrs. Smith, their two children, Sarah and James, and their pet dog, Max. Sarah is a ballet dancer who practices for hours every day, while James is an aspiring musician who plays the guitar. Max loves to play fetch in the backyard and takes long naps in the sun. The Smith family enjoys spending time together on weekends, going for hikes in the nearby mountains and picnicking by the lake.
Can we infer that "Sarah is the only child in the Smith family."? Yes, no, or maybe?