{"type":"rich","version":"1.0","author_name":"ze_rusty (npub16g…yulsy)","author_url":"https://nostr.ae/npub16guycjkxy04e79dwfjejaeafkqlqyq5q94f0yw2l9m50vse32x4qsyulsy","provider_name":"njump","provider_url":"https://nostr.ae","html":"Basic principles of Frequency Modulation\n\n1944 U.S. WAR DEPARTMENT FILM\n\n\nhttps://www.youtube.com/watch?v=AzvxefRDT84"}