sentence2_structure: The presence of an animal fossil in a rock<>gives<>evidence of the time period$$$the animal<>lived<>in
sentence1: From these fossils and impressions in sedimentary rock, we can tell what kind of plants and animals lived at a certain period in the very ancient past.
sentence2: The presence of an animal fossil in a rock gives evidence of the time period the animal lived in.
question: The presence of an animal fossil in a rock gives evidence of