Where small food items were delivered at a high frequency, birds collected prey items in the beak before swallowing them.
(small food items; were delivered; L:at a high frequency) (birds; collected; prey items in the beak; T:before swallowing them; T:Where small food items were delivered at a high frequency) Context(birds collected,List([59, 74))):(birds; collected prey items in the beak before swallowing; them)
birds collected,List([59, 74))
small food items birds birds
were delivered collected collected prey items in the beak before swallowing
L:at a high frequency
prey items in the beak T:before swallowing them T:Where small food items were delivered at a high frequency
them