Chaco tree frog
Its natural habitats are subtropical or tropical dry forests , subtropical or tropical moist lowland forests , subtropical or tropical dry lowland grassland , rivers , swamps , freshwater lakes , intermittent freshwater lakes , freshwater marshes , intermittent freshwater marshes , urban areas , and heavily degraded former forests . 
<triplet> grassland <subj> habitat <obj> instance of <triplet> swamp <subj> forest <obj> subclass of