add missing example subject_id
add missing example subject_id

In the output result above,  the case with `subject_id = 471` has a tranfer service and the ` = 471` seems missing in text.
MIT-LCP/mimic-code-sharing,MIT-LCP/mimic-code,MIT-LCP/mimic-code-sharing,MIT-LCP/mimic-code,MIT-LCP/mimic-code