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Use "when'd" in a sentence
"I didn't realize the economy got stimulated ... when'd that happen?"
"LAMB: Back over the last so many years that you've been thinking about this issue, when'd you first start thinking about architecture and transportation and all these issues you're talking about?"
"LAMB: You write about Saddam Hussein, and before I ask any questions about him, when was this book -- when'd you put it to bed?"