Complex sentence: However, levels of activation have been found to depend on the semantic relevance of the object, where objects with high semantic relevance, such as artefacts, create an increase in activation compared to objects with low semantic relevance, such as natural objects.
Split into simpler sentences: However, levels of activation have been found to depend on the semantic relevance of the object. Results showed that objects with high semantic relevance, such as artefacts, created an increase in activation compared to objects with low semantic relevance, such as natural objects.