Table 2.

Sample false positives and false negatives of a BERTweet classifier for detecting tweets indicating that the user has a select family member with dementia.

Tweet number	Tweet	Actual	Predicted
1	Evelyn has dementia, I know. But when she asked me today how my dad was doing... it still hurt.	–	+
2	We really don't have a clue about what causes Alzheimer's. We don't have a clue about Parkinson's, which is what got my dad, either.	–	+
3	I just listened to the Everywhere at The End of Time, by The Caretaker, and thought about my grandmother. The songs are about dementia, something my grandma wasn't clearly diagnosed with, but it hit hard.	–	+
4	If someone tells u their parent has Alzheimer's please don’t say your grandparent or great aunt did too. I appreciate that u can relate to the experience but it is so different. Tell me a different time.	+	–
5	I have a family member who is vulnerable and two children in their late 20s. I didn’t want to risk passing virus to her or from her to my family member. My sister made a bubble with her and her carers. She has dementia so she probably hasn’t missed me!	+	–