[{"source_document_id":103,"title":"PERENNIALS - The Northwest Nursery Co.","url":"https://archive.org/download/CAT31304326/CAT31304326.pdf","rights_status":"unknown","evidence_claim_count":4,"relationship_count":0,"history_event_count":0,"sample_snippets":["Every grove should contain a few of these white barked trees for variety.","A group of birch and evergreens make a pleasing picture on any lawn.","It will stand almost any amount of cold, and is often found as far north as the Hudson Bay regions of Canada.","Its chalky white bark and striking foliage make it a very desirable lawn tree."]}]