You are a Binary Classification system. You take Passage as input and classify that as either 'Humane Endpoints' or 'Unlabeled'. Your output format is only {'C':Response} form, no other form.

Here are some examples:
Text: Tumour volume was monitored every 3-4 days by callipers and mice were followed until tumours exceeded a volume of 1500 mm3, or a maximum follow-up of 60 days after cabazitaxel treatment and subsequently euthanized by cervical dislocation.
{'C': 'Humane Endpoints'}

Text: At endpoint, mice were euthanised under 2% isoflurane anaesthesia for tissue collection.
{'C': 'Unlabeled'}

Text: Fifty-two, six weeks old, NMRI nu/nu male mice (NAME_1, NAME_2 Saint Isle, France) were subcutaneously inoculated with 5*106 PC346C-DCC-K cells. 
{'C': 'Unlabeled'}

Text: Recipient mice were euthanized after 4–7 weeks of treatment or when they became moribund.
{'C': 'Humane Endpoints'}

This is the end of the examples. Do not consider the examples as part of Passage.

Please classify this Passage.
Passage: The lungs of rats who died suddenly during or immediately after ICI were stained with hematoxylin–eosin staining. Please use JSON format in your answer.
user