diff --git a/lib/chrontext/src/sparql_database/sparql_embedded_oxigraph.rs b/lib/chrontext/src/sparql_database/sparql_embedded_oxigraph.rs
index 4817db2..26e9bc9 100644
--- a/lib/chrontext/src/sparql_database/sparql_embedded_oxigraph.rs
+++ b/lib/chrontext/src/sparql_database/sparql_embedded_oxigraph.rs
@@ -108,8 +108,10 @@ impl EmbeddedOxigraph {
             let mut reader = BufReader::new(file);
             store
                 .bulk_loader()
-                .load_from_read(RdfParser::from_format(RdfFormat::NQuads).unchecked(),
-                                &mut reader)
+                .load_from_read(
+                    RdfParser::from_format(RdfFormat::NQuads).unchecked(),
+                    &mut reader,
+                )
                 .map_err(|x| EmbeddedOxigraphError::LoaderError(x.to_string()))?;
             if let Some(p) = &config.path {
                 let mut pb = Path::new(p).to_path_buf();
diff --git a/lib/chrontext/src/sparql_database/sparql_endpoint.rs b/lib/chrontext/src/sparql_database/sparql_endpoint.rs
index 3360b5e..e0715b3 100644
--- a/lib/chrontext/src/sparql_database/sparql_endpoint.rs
+++ b/lib/chrontext/src/sparql_database/sparql_endpoint.rs
@@ -2,7 +2,10 @@ use super::SparqlQueryable;
 use async_trait::async_trait;
 use reqwest::header::{ACCEPT, USER_AGENT};
 use reqwest::StatusCode;
-use sparesults::{FromReadQueryResultsReader, QueryResultsFormat, QueryResultsParseError, QueryResultsParser, QuerySolution};
+use sparesults::{
+    FromReadQueryResultsReader, QueryResultsFormat, QueryResultsParseError, QueryResultsParser,
+    QuerySolution,
+};
 use spargebra::Query;
 use std::error::Error;
 use std::fmt::{Display, Formatter};
diff --git a/py_chrontext/src/lib.rs b/py_chrontext/src/lib.rs
index de5d7c3..30117b0 100644
--- a/py_chrontext/src/lib.rs
+++ b/py_chrontext/src/lib.rs
@@ -151,7 +151,12 @@ impl Engine {
         Ok(())
     }
 
-    pub fn query(&mut self, py: Python<'_>, sparql: &str, multi_to_strings: Option<bool>) -> PyResult<PyObject> {
+    pub fn query(
+        &mut self,
+        py: Python<'_>,
+        sparql: &str,
+        multi_to_strings: Option<bool>,
+    ) -> PyResult<PyObject> {
         if self.engine.is_none() {
             self.init()?;
         }
@@ -164,7 +169,8 @@ impl Engine {
             .block_on(self.engine.as_mut().unwrap().execute_hybrid_query(sparql))
             .map_err(|err| PyChrontextError::QueryExecutionError(err))?;
 
-        (df, datatypes) = fix_cats_and_multicolumns(df, datatypes, multi_to_strings.unwrap_or(false));
+        (df, datatypes) =
+            fix_cats_and_multicolumns(df, datatypes, multi_to_strings.unwrap_or(false));
         let pydf = df_to_py_df(df, dtypes_map(datatypes), py)?;
         Ok(pydf)
     }
@@ -177,7 +183,7 @@ impl Engine {
         builder.enable_all();
         let config = Config::default();
         let catalog = catalog.to_rust()?;
-        let res = builder
+        builder
             .build()
             .unwrap()
             .block_on(start_server(self.engine.take().unwrap(), config, catalog))