Extract and summarize key points from customer reviews

Input:
{
  "Before": "[{   \"product_id\": 1,   \"review\": \"This phone has an amazing camera, but the battery life is not that great.\" }, {   \"product_id\": 2,   \"review\": \"The sound quality of these headphones is excellent, but they are a bit too tight on the head.\" }]"
}

Output:
{
  "After": "[{   \"product_id\": 1,   \"review\": \"This phone has an amazing camera, but the battery life is not that great.\",   \"key_points\": {     \"pros\": [\"amazing camera\"],     \"cons\": [\"poor battery life\"]   },   \"linked_products\": [     {\"related_product_id\": 5, \"reason\": \"better battery life\"}   ] }, {   \"product_id\": 2,   \"review\": \"The sound quality of these headphones is excellent, but they are a bit too tight on the head.\",   \"key_points\": {     \"pros\": [\"excellent sound quality\"],     \"cons\": [\"too tight\"]   },   \"linked_products\": [     {\"related_product_id\": 6, \"reason\": \"more comfortable fit\"}   ] }]"
}