Examples: a bird will not learn its song unless it hears it at an early age
birdcall (English)├── bird (English)│ ├── brid (Middle English (1100-1500))│ │ └── bridd (Old English (ca. 450-1100))│ └── burung (Malay (macrolanguage))└── call (English) └── callen (Middle English (1100-1500))
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