Complex sentence: On 22 February 1943, at a conference with his senior staff, including Milch and Jeschonnek, Göring refused to accept the Americans had a decent fighter design and considered the P-47 Thunderbolt that was appearing over German air space inferior to the German fighters.
Split into simpler sentences: On 22 February 1943, at a conference with his senior staff, including Milch and Jeschonnek, Göring refused to accept the Americans had a decent fighter design. The P-47 Thunderbolt that was appearing over German air space was considered inferior to the German fighters.