nun sla lujvo

n₁ is the celebration/event where s₁ celebrates/recognizes/honors s₂ (event/abstract) with activity/[party] s₃.

In notes:

jbenunsla: x₁=n₁ is the birthday celebration with celebrators x₂=s₁ of x₃=s₂=j₁, born to x₄=j₂ at time [birthday] x₅=j₃ and place x₆=j₄, with birthday party x₇=s₃.
na'arba'onunsla: x₁ is the birthday of x₂ with activities x₃; x₁ is the annual celebration of x₂ growing in age by 1 full year.
salci: x₁ celebrates/recognizes/honors x₂ (event/abstract) with activity/[party] x₃.