Use the WolframAlpha interface to discover particular entities:

Represent all of the countries in Europe:

Get a list of all the countries:

Get a list of all chemicals that are alcohols:

Get the population of all G7 countries:

A list of available entity classes can be found with EntityClassList:

Create an implicitly defined entity class consisting of all elements whose densities fall within a specified range:

Explicitly list the elements:

Use an implicitly defined entity class to select the countries with the world's 10 longest borders and return them together with their corresponding border lengths:

An implicitly defined entity class may be specified using any number of property values:

Return a list of aircraft satisfying the above criteria:

List the entities that simultaneously satisfy a combination of largest and smallest ordinal conditions together with an explicit property value:

List the largest three countries in the Group of 8 by population:

Get information about an EntityClass:

Calculate the mean and standard deviation of the maximum weight for all dog breeds specified by a minimal male height:

Construct an implicitly defined entity class consisting of movies featuring Angelina Jolie:

Retrieve titles, release dates, and posters for these films:

Make a timeline illustrating when these movies were released:

Determine which measurement devices are examples of thermometers:

List all the physical effects discovered in 1930:

Use an implicitly defined entity class consisting of the five longest digestive organs and return them together with their corresponding images:

Use an implicitly defined entity class to find the top 10 sheep breeds sorted by the amount of fleece they produce and return them together with their corresponding images:

Find yellow Pokémon with their body weight between 50 and 100 kg:

Make a collage of their images weighted by their body mass:

Stars with apparent magnitude between and 1:

The 15 nearest stars:

The 15 brightest stars:

Find the stars that are among both the 15 nearest and the 15 brightest:

The three largest planets in the solar system:

The closest star to Earth other than the Sun:

The three closest planets to Earth on Jan 3, 2013, sorted by distance:

Find mathematical functions related to the Gudermannian function:

Find mathematical functions with more than 10 named identities:

Get a random physical system with two degrees of freedom:

Get the three largest continents by population:

Implicit entity classes may contain no entities:

Verify that the largest floor counts in the world are (much) smaller than even the lower endpoint of the interval specified above: