my changes

app/License.php

@@ -0,0 +1,29 @@
+<?php
+namespace App;
+
+use Illuminate\Database\Eloquent\Model;
+
+class License extends Model
+{
+    protected $table = 'document_licences';
+    public $timestamps = false;
+
+    protected $fillable = [
+        'active',
+        'desc_text',
+        'desc_text',
+        'desc_text',
+        'language',
+        'link_licence',
+        'link_logo',
+        'mime_type',
+        'name_long',
+        'pod_allowed',
+        'sort_order'
+    ];
+
+    public function datasets()
+    {
+        return $this->belongsToMany(\App\Dataset::class, 'link_documents_licences', 'licence_id', 'document_id');
+    }
+}