Http://annabelsuenanimalfarmallegory.weebly.com/karl-marx.html
Here is a link. I hope it helps! :)
Yes, I do have a headache actually, it won’t go away...
The correct version of these two sentences when combined is:
When we were in Europe on vacation, we usually flew on airplanes: however, sometimes we took the train.
We apply the semi-colon to indicate that they have different ideas, and that they are clauses being joined into one sentence.
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