...
{
"op": "core/text-transform",
"description": "Text transform on cells in column tipp.url using expression grel:replace(value,\"http://www.bmj.com/the BMJ\",
...
{
"op": "core/text-transform",
"description": "Text transform on cells in column tipp.url using expression grel:replace(value,\"http://www.bmj.com/the BMJ\",