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diff --git a/rust/rustlings/exercises/16_lifetimes/lifetimes3.rs b/rust/rustlings/exercises/16_lifetimes/lifetimes3.rs
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+// Lifetimes are also needed when structs hold references.
+
+// TODO: Fix the compiler errors about the struct.
+struct Book<'a> {
+ author: &'a str,
+ title: &'a str,
+}
+
+fn main() {
+ let book = Book {
+ author: "George Orwell",
+ title: "1984",
+ };
+
+ println!("{} by {}", book.title, book.author);
+}