Provide example of an associative entity

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diff --git a/assignments/1/README.md b/assignments/1/README.md
index c3b284d..f2e1989 100644
--- a/assignments/1/README.md
+++ b/assignments/1/README.md
@@ -44,6 +44,31 @@ An `entity instance` is a specific occurrence of the `entity type`. .i.e. a spec
 Give a simple example of an E-R diagram for each of the following concepts:
 
 a. Associative entity
+  > An entity type that associates the instances of one or more entity types and contains attributes that are peculiar to the relationship between those entity instances.
+
+  Project ||-<- Policy ->-|| SoftwareLicense
+  ```plantuml
+  @startuml
+  entity 'Project' as project {
+    *id: number
+    *name: varchar(255)
+  }
+  entity 'Policy' as policy {
+    *id: number
+    *classification: number
+    *project_id: number
+    *software_license_id: number
+  }
+  entity 'SoftwareLicense' as license {
+    *id: number
+    *spdx_id: varchar(255)
+    *name: varchar(255)
+  }
+  project ||..|{ policy
+  license ||..|{ policy
+  @enduml
+  ```
+
 b. Weak entity
 c. Unary relationship