ReGex with python

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Hi, I have a problem I could not solve, ask for your cooperation.

"show_app_install": true, "static_root": "//instagramstatic-a.akamaihd.net/h1", 
"platform": "web", "activity_counts": null, "hostname": "www.instagram.com", 
"entry_data": {"PostPage": [{"media": {"caption_is_edited": false, "code": 
"BL1X_KlhEgp", "date": 1477072256, "dimensions": {"width": 750, "height": 750}, 
"usertags": {"nodes": []}, "comments_disabled": false, "comments": {"count": 1, 
"page_info": {"has_previous_page": false, "start_cursor": null, "end_cursor": 
null, "has_next_page": false}, "nodes": [{"text": "Muy buena.ja ja", 
"created_at": 1477073804.0, "id": "17854331140105338", "user": {"username": 
"jairo_becerra_castano", "profile_pic_url": 
"https://igcdn-photos-f-a.akamaihd.net/hphotos-ak-xpa1/t51.2885-19/s150x150/14052608_540744196124877_178395402_n.jpg";,
 "id": "2311473855"}}]}, "id": "1366103557740447785", "caption": 
"Jajajajajajajajaja, uyyyyyyy Echeverry, a cuantos enga\\u00f1aron con este 
cuento? #plebiscito #paz #colombia", "likes": {"count": 9, "viewer_has_liked": f
 alse, "nodes": [{"user": {"username": "lpintor7", "profile_pic_url": 
"https://igcdn-photos-h-a.akamaihd.net/hphotos-ak-xpa1/t51.2885-19/11257245_514557058701967_834362393_a.jpg";,
 "id": "184969394"}}, {"user": {"username": "lination24", "profile_pic_url": 
"https://igcdn-photos-g-a.akamaihd.net/hphotos-ak-xpa1/t51.2885-19/s150x150/14027341_154551878317334_55370841_a.jpg";,
 "id": "177966087"}}, {"user": {"username": "maccamontero", "profile_pic_url": 
"https://igcdn-photos-g-a.akamaihd.net/hphotos-ak-xpa1/t51.2885-19/s150x150/14359472_532259770300854_7780250093252247552_a.jpg";,
 "id": "595746059"}}, {"user": {"username": "jairo_becerra_castano", 
"profile_pic_url": 
"https://igcdn-photos-f-a.akamaihd.net/hphotos-ak-xpa1/t51.2885-19/s150x150/14052608_540744196124877_178395402_n.jpg";,
 "id": "2311473855"}}, {"user": {"username": "dieguito_kintero", 
"profile_pic_url": 
"https://igcdn-photos-g-a.akamaihd.net/hphotos-ak-xpa1/t51.2885-19/10499068_1393117677674150_1052081019_a.jpg";,
 "id": "177766331
 8"}},

I need only select the text and caption, in this case:
Muy buena.ja ja
Jajajajajajajajaja, uyyyyyyy Echeverry, a cuantos enga\\u00f1aron con este 
cuento? #plebiscito #paz #colombia

Thanks!.
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