The WD SPARQL editor has auto-complete (eg type "wdt:award" and press control-space) and readout on hover.
To make the query more readable, use some comments (see my query above).
Yes, WD SPARQL has a firm timeout of 1 minute then may even cut out the response in half. I think it's falling victim of its own popularity (the API is imho much less popular).
There are optimization techniques that one can use, but they take some experience and patience. One good way is to use federated SPARQL insert to a local repo (assuming you want to selectively copy and reshape RDF data), eg our GraphDB repo has batching of federated queries that avoids the timeout.
To make the query more readable, use some comments (see my query above).
Yes, WD SPARQL has a firm timeout of 1 minute then may even cut out the response in half. I think it's falling victim of its own popularity (the API is imho much less popular).
There are optimization techniques that one can use, but they take some experience and patience. One good way is to use federated SPARQL insert to a local repo (assuming you want to selectively copy and reshape RDF data), eg our GraphDB repo has batching of federated queries that avoids the timeout.