The "gon" verses in "lam tang san" were typically preceded by a slower, speech-rhythm introduction, which included the words "o la no" ("oh my dear", an exhortation to the listeners to pay attention) and often a summary of the content of the poem. From this derives the "groen" (Thai เกริ่น) used in many modern songs: a slow, sung introduction, generally accompanied by the khene, introducing the subject of the song, and often including the "o la naw". ([//upload.wikimedia.org/wikipedia/en/9/97/Gernsample.ogg sample]) The "pleng" (Thai เพลง) is a sung verse, often in central Thai. ([//upload.wikimedia.org/wikipedia/en/b/bf/Plaengsample.ogg sample]), while the actual "lam" (Thai ลำ) appears as a chorus between "pleng" sections. ([//upload.wikimedia.org/wikipedia/en/6/61/Lamsample.ogg sample])