context: However, it appears that she did not buy all of the arsenic which killed her patients.
source: The doctor and some of the patients had signed off to purchase it.
reference_original: كانت الطبيبة وبعض المرضى قد وقّعوا على شراءه.
reference_flipped: كان الطبيب وبعض المرضى قد وقّعوا على شراءه.