Is this sentence ambiguous without more context?
--Where people were concerned, his threshold of boredom was low. --
Possible interpretations:
1) When he had to get on with people,he was easily bored. [ There were typos here before the edition: ...people, she eas easily...]
2) When people were worried, they were easily bored. [Here "people were" was "one was" before the edition]
3)...?