When the animal was undergoing metamorphosis, changing from tadpole to frog, the effect was startling.
(the animal; was undergoing; metamorphosis) (the animal; changing; from tadpole to frog) (the effect; was; startling; T:When the animal was undergoing metamorphosis, changing from tadpole to frog)
the animal the animal the effect
was undergoing changing was
metamorphosis
from tadpole to frog
startling T:When the animal was undergoing metamorphosis, changing from tadpole to frog