You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: arxiv.go
    path of file: ./repos/s/providers/arxiv
    
    the code of the file until where you have to start completion: package arxiv

import (
	"fmt"
	"net/url"
	"strings"

	"github.com/zquestz/s/providers"
)

func init() {
	providers.AddProvider("arxiv", &Provider{})
}

// Provider merely implements the Provider interface.
type Provider struct{}

// If the query contains more than 1 word, the format to 
    
func (p *Provider) BuildURI(q string) string {
	// Separate query by "or".
	queries := strings.Split(q, " or ")
	results := make([]string, len(queries))
	for i := 0; i < len(queries); i++ {
		// Each query should be formatted with "AND".
		splittedQuery := strings.Split(queries[i], " ")
		results[i] = formatWithOp(splittedQuery, "AND")
	}

	return fmt.Sprintf("http://arxiv.org/find/all/1/all:+%s/0/1/0/all/0/1",
		url.QueryEscape(formatWithOp(results, "OR")))
}