instruction:
Given a text, write a compressed version of it in a single sentence.
question:
I have lately been reading accounts of the exploration of the western and northwestern deserts of Australia in the 1870s and I have become very aware of the effect absent necessities might have on the frequency of particular items in discourse.
answer:
Lately I've been reading about exploration of Australia's western and northwestern deserts in the 1870s, and I've noticed how often absent necessities are noted in the accounts.

question:
Specifically, we matched data from the HCTAR survey to corresponding establishment-level data from the Department of Commerce's Longitudinal Research Database (LRD). The LRD provides longitudinal data for establishments included in the Bureau of the Census Annual Survey of Manufacturing.
answer:
We matched data from the HCTAR survey to corresponding establishment-level data from the Department of Commerce's (LRD).

question:
4) Since most major airports are located around large bodies of water, both air crews and aircraft are certified with airworthiness certificates based on evacuation procedures that include water landings.
answer:
Most air crews and aircrafts are certified on evacuation procedures that include water landings, because most airports are located near water.