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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def validate_pro():
 """Validate on professional data."""

    cmd = ['python3', 'validate.py', FLAGS.pro_dataset,
           '--use_tpu',
           '--tpu_name={}'.format(TPU_NAME),
           '--work_dir={}'.format(fsdb.working_dir()),
           '--flagfile=rl_loop/distributed_flags',
           '--validate_name=pro']
    mask_flags.run(cmd)