linkml-run-examples missing base prefix

[turbomam]

converted-data/MimsSoil-example.ttl: $(SOURCE_SCHEMA_PATH) curated-data/valid/MixsCompliantData-MimsSoil-example.yaml
	$(RUN) linkml-convert \
		--output $@ \
		--target-class MixsCompliantData \
		--index-slot mims_soil_data \
		--schema $^

[turbomam]

Traceback (most recent call last):
File "/home/mark/.cache/pypoetry/virtualenvs/mixs-envo-struct-knowl-extraction-xMtsyy1A-py3.9/bin/linkml-convert", line 8, in
sys.exit(cli())
File "/home/mark/.cache/pypoetry/virtualenvs/mixs-envo-struct-knowl-extraction-xMtsyy1A-py3.9/lib/python3.9/site-packages/click/core.py", line 1157, in call
return self.main(*args, **kwargs)
File "/home/mark/.cache/pypoetry/virtualenvs/mixs-envo-struct-knowl-extraction-xMtsyy1A-py3.9/lib/python3.9/site-packages/click/core.py", line 1078, in main
rv = self.invoke(ctx)
File "/home/mark/.cache/pypoetry/virtualenvs/mixs-envo-struct-knowl-extraction-xMtsyy1A-py3.9/lib/python3.9/site-packages/click/core.py", line 1434, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "/home/mark/.cache/pypoetry/virtualenvs/mixs-envo-struct-knowl-extraction-xMtsyy1A-py3.9/lib/python3.9/site-packages/click/core.py", line 783, in invoke
return __callback(*args, **kwargs)
File "/home/mark/.cache/pypoetry/virtualenvs/mixs-envo-struct-knowl-extraction-xMtsyy1A-py3.9/lib/python3.9/site-packages/linkml/utils/converter.py", line 175, in cli
dumper.dump(obj, output, **outargs)
File "/home/mark/.cache/pypoetry/virtualenvs/mixs-envo-struct-knowl-extraction-xMtsyy1A-py3.9/lib/python3.9/site-packages/linkml_runtime/dumpers/rdflib_dumper.py", line 154, in dump
super().dump(element, to_file, schemaview=schemaview, fmt=fmt, prefix_map=prefix_map)
File "/home/mark/.cache/pypoetry/virtualenvs/mixs-envo-struct-knowl-extraction-xMtsyy1A-py3.9/lib/python3.9/site-packages/linkml_runtime/dumpers/dumper_root.py", line 19, in dump
output_file.write(self.dumps(element, **_))
File "/home/mark/.cache/pypoetry/virtualenvs/mixs-envo-struct-knowl-extraction-xMtsyy1A-py3.9/lib/python3.9/site-packages/linkml_runtime/dumpers/rdflib_dumper.py", line 167, in dumps
return self.as_rdf_graph(element, schemaview, prefix_map=prefix_map).
File "/home/mark/.cache/pypoetry/virtualenvs/mixs-envo-struct-knowl-extraction-xMtsyy1A-py3.9/lib/python3.9/site-packages/linkml_runtime/dumpers/rdflib_dumper.py", line 59, in as_rdf_graph
self.inject_triples(element, schemaview, g)
File "/home/mark/.cache/pypoetry/virtualenvs/mixs-envo-struct-knowl-extraction-xMtsyy1A-py3.9/lib/python3.9/site-packages/linkml_runtime/dumpers/rdflib_dumper.py", line 132, in inject_triples
v_node = self.inject_triples(v, schemaview, graph, slot.range)
File "/home/mark/.cache/pypoetry/virtualenvs/mixs-envo-struct-knowl-extraction-xMtsyy1A-py3.9/lib/python3.9/site-packages/linkml_runtime/dumpers/rdflib_dumper.py", line 111, in inject_triples
element_uri = self._as_uri(element_id, id_slot, schemaview)
File "/home/mark/.cache/pypoetry/virtualenvs/mixs-envo-struct-knowl-extraction-xMtsyy1A-py3.9/lib/python3.9/site-packages/linkml_runtime/dumpers/rdflib_dumper.py", line 174, in _as_uri
return schemaview.namespaces().uri_for(element_id)
File "/home/mark/.cache/pypoetry/virtualenvs/mixs-envo-struct-knowl-extraction-xMtsyy1A-py3.9/lib/python3.9/site-packages/linkml_runtime/utils/namespaces.py", line 212, in uri_for
raise ValueError(f"{TypedNode.yaml_loc(uri_or_curie)}Unknown CURIE prefix: {prefix}")
ValueError: File "MixsCompliantData-MimsSoil-example.yaml", line 11, col 16: Unknown CURIE prefix: @base
make: *** [/home/mark/gitrepos/mixs-envo-struct-knowl-extraction/project.Makefile:546: converted-data/MimsSoil-example.ttl] Error 1

[turbomam]

from samp_name, because I set identifier to True

[turbomam]

do I need to set the following in linkml-convert?

-c, --context TEXT path to JSON-LD context file