I am wondering if I should use "was" or "were" in the following sentence, which is from a scientific paper.
"Field data (4000 points) and gradient data (three projections) WAS/WERE sent to the PC."
I think "were" sounds correct, but data is uncountable and usually uses "was". Does using "and" mean I have to refer to the subject of the sentence as plural even if the nouns themselves are uncountable/collective nouns?
EDIT: In other words, if I have two sub-types of the same collective noun (data), do I have to treat the subject of the sentence as plural? Or does combining two instances with the same collective noun yield a subject that is singular?