[Verse 1] When grammars get tangled, productions run wild A → BC or A → a, keep the rules compiled Strip away the chaos, make the structure clean Chomsky Normal Form builds the parsing machine [Chorus] Two choices only, never break the law Binary splits or terminals raw CNF will guide you, CYK can parse Two choices only, that's the golden clause [Verse 2] Start symbol gets epsilon if your language needs empty Every other rule follows patterns so plenty Left side single variable, right side pairs or one Convert any context-free, the battle can be won [Chorus] Two choices only, never break the law Binary splits or terminals raw CNF will guide you, CYK can parse Two choices only, that's the golden clause [Bridge] Eliminate the unit rules Chain productions breaking through Introduce new variables Split the long ones into two Bottom-up will thank you When the table fills complete Normal form enables Dynamic programming feat [Verse 3] From messy grammar chaos to algorithmic grace CYK needs this structure to efficiently trace Each substring gets tested through the triangle climb Polynomial parsing in cubic time [Chorus] Two choices only, never break the law Binary splits or terminals raw CNF will guide you, CYK can parse Two choices only, that's the golden clause [Outro] Chomsky gave us order From the context-free domain Normal form's the gateway To the parsing algorithm reign
← 1 Context-Free Grammars (CFG) | 3 Pushdown Automata (PDA) →