How to pass the graph variable into from statement in sparql?

@dana 

In SPARQL, you can pass the graph variable into the from statement by using the GRAPH clause.

Here is an example query:

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PREFIX ex: <http://www.example.com/>
SELECT ?s ?p ?o
FROM ?graph
WHERE {
  GRAPH ?graph {
    ?s ?p ?o
  }
}

In this query, the ?graph variable is passed in the FROM clause. This allows you to specify which graph you want to query the data from. You can replace ?graph with the actual graph URI or a variable that contains the graph URI.

Make sure that your dataset supports named graphs and that the graph you are querying is accessible in your SPARQL endpoint.