The property of type "Aircraft" representing the cruise speed:

Retrieve the cruise speed of the Concorde:

Find the population of the United States:

Find the population in 1980:

Make the same query using Dated:

Find the "Unit" of the "molar mass" property:

Use to query for the molecular mass of caffeine:

Get possible qualifiers for the city population property:

Get possible qualifier values for the "Age" qualifier:

Use the "Age" qualifier with the "Adult" value:

EntityProperty can have qualifiers to be more specific about a property:

Here the "Date" qualifier specifies a particular year:

Create a date range from the year 1900 to 2010 in steps of 5 years:

Get the population of the Netherlands for those years:

Make a date plot using this data:

The EntityProperty wrapper is optional here. It is sufficient to use the property name:

Calling entities with one property at a time is slower than calling entities with a single list of properties:

This form is faster because the entity properties are requested with a single call:

The entities and their properties are cached, so subsequent calls are much faster: