diff --git a/lectures/2.3_data_access/2.3_data_access.md b/lectures/2.3_data_access/2.3_data_access.md
index 20223ef..5de4aef 100644
--- a/lectures/2.3_data_access/2.3_data_access.md
+++ b/lectures/2.3_data_access/2.3_data_access.md
@@ -188,7 +188,7 @@ EO: Earth observation
 Jointly, the openEO targets the processing and analysis of Earth observation data. The main objectives of the project are the following concepts:
 
 - Simplicity: nowadays, many end-users use Python or R to analyse data and JavaScript to develop web applications; analysing large amounts of EO imagery should be equally simple, and seamlessly integrate with existing workflows
-- Unification: current EO cloud back-ends all have a different API (opens new window), making EO data analysis hard to validate and reproduce and back-ends difficult to compare in terms of capability and costs, or to combine them in a joint analysis across back-ends. A unified API can resolve many of these problems.
+- Unification: current EO cloud back-ends all have a different API, making EO data analysis hard to validate and reproduce and back-ends difficult to compare in terms of capability and costs, or to combine them in a joint analysis across back-ends. A unified API can resolve many of these problems.
 
 ### Why an API?