instruction:
In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.
question:
Geochronology is the main tool used to get absolute age dates for all fossil assemblages , and for the history of the Earth and other bodies .
answer:
The science of geochronology is the prime tool used in the discipline of chronostratigraphy , which attempts to derive absolute age dates for all fossil assemblages and determine the geologic history of the Earth and extraterrestrial bodies .


question:
Plessy argued that the state law which required East Louisiana Railroad to segregate trains had denied him his rights under the Thirteenth and Fourteenth Amendments to the United States Constitution .
answer:
The State of Louisiana " , Plessy 's lawyers argued that the state law which required East Louisiana Railroad to segregate trains had denied him his rights under the Thirteenth and Fourteenth amendments of the United States Constitution , which provided for equal treatment under the law .


question:
The most common SI units for density are g / cm and kg / m .
answer:

The SI unit of kilogram per cubic metre ( kg / m ) and the cgs unit of gram per cubic centimetre ( g / cm ) are probably the most commonly used units for density .


