Task: Question Answering
Input (English): We use the Ultrax Typically Developing dataset (UXTD) from the publicly available UltraSuite repository BIBREF19 . This dataset contains synchronized acoustic and ultrasound data from 58 typically developing children, aged 5-12 years old (31 female, 27 male).  
 Question: How many speakers do they have in the dataset?
Output (English): 58