The phrase "a third features" is not correct in English.
Did you mean "a third feature"? If this is the case, you can use it when referring to one of three distinct characteristics or elements of something.
Example: "The product has several advantages, and a third feature is its energy efficiency."
Alternatives: "one of three features" or "a third characteristic".
A third features children swinging around a watchtower as though it were a fairground ride.
A third features images taken by nine photojournalists during the war in Iraq and in post-9/11 America and Afghanistan.
A third features Ms. Quaytman's initials painted on a dark background, and mimics the attenuated styling of Ms. Kobro's "Spatial Sculptures".
The journal is published thrice yearly: one issue appears each semester of the academic year, and a third features the finest poems presented at the annual Alfred Joyce Kilmer Memorial Bad Poetry Contest.
Here she rants in a still from "Who's Afraid of Virginia Woolf?"; an image from "Cleopatra" depicts her as a Toulouse Lautrec apparition; and a third features a bed scene lifted from "Cat on a Hot Tin Roof," with Liz reading tarot cards, surrounded by books like "Sex and the Zodiac" and Aleister Crowley's "Diary of a Drug Fiend".
One recent Sunday the blog introduced several memorable entries: in one, the cartoony headline "I Am Terrified of Macaulay Culkin" is pasted onto a snapshot of the actor; in another a ribbon of words, "I wish I knew more gay people," stretches across a rainbow; while a third features a sketch of a flop-eared rabbit, annotated with the grim tidings, "Dear Binkers, you're getting neutered tomorrow".
A third feature shared by the two accidents is location, and a fourth is timing".
A third feature, The SpongeBob Movie: It's a Wonderful Sponge, is in production.
A third feature of happiness is what the ancient Greeks called the proper "use of pleasure".
A third feature is that the sample sizes can be large.
An observed correlation between two features that is caused by direct relationships between these two features and a third feature.
