I had to look up 'madlibs', but I see now what you mean. We do indeed have lots of canned phrases, some of which are idioms. They may indeed come with blanks at the end (your example) or even in the middle ("pull __'s leg"). The issue I have with the original paper is that these canned phrases need to fit in with the language's overall grammar, e.g. "What did the fire alarm come in the middle of __?"
"Tree-style sentence mapping": I assume you mean the old sentence diagramming where the main part (more or less) of the sentence was on a line, and adjuncts (like prepositional phrases) were shown as branching off the bottom of the line on a diagonal. But there are also tree diagrams of the sort made popular by Chomsky and the generativists who followed. In fact I was once employed doing more or less that, just before the AI bubble in the late 80s. Fun!
"Tree-style sentence mapping": I assume you mean the old sentence diagramming where the main part (more or less) of the sentence was on a line, and adjuncts (like prepositional phrases) were shown as branching off the bottom of the line on a diagonal. But there are also tree diagrams of the sort made popular by Chomsky and the generativists who followed. In fact I was once employed doing more or less that, just before the AI bubble in the late 80s. Fun!